• Mac Pro Memory

• Mac Mini Memory

• Upgraded Macs

• Ddr Ram For Mac
• Ddr3 Ram For Mac
• Ddr Memory For Macbook Pro
• Ddr Memory For Mac Computers
• Ddr Memory For Laptop

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Tips and Tools

Is Your Mac Ready for macOS Sierra?

If you aren't sure whether you can upgrade to macOS Sierra, take a look at some of our recommendations. In general, 4GB of Memory is a minimum requirement, 8GB of Memory is recommended, and 16GB or more is ideal because it gives you enough room for most of your other applications. The models below are oldest ones that still qualify for a macOS Sierra upgrade.

MacBook Pro 7,1

This MacBook Pro 7,1 was released in Mid 2010. It's published system maximum is 8GB although we can upgrade this machine to 16GB of RAM as it has been thoroughly tested in our labs. This is perfect for those who like to keep a lot of apps or browser tabs open at the same time.

MacBook 6,1

The MacBook 6,1 was released in Late 2009. Its published system maximum is 4GB. We can upgrade this machine to 8GB of RAM as it has been thoroughly tested in our labs. Running macOS Sierra on 8GB over 4GB of RAM is a significant improvement. Say goodbye to the spinning wheel of pain!

iMac 10,1

The iMac 10,1 was released in Late 2009. We call this a four slot machine because there are four memory banks. The published system maximum is 16GB or 4x4GB. Don't think about upgrading beyond the 16GB maximum. We've tried and failed many times over! If you have less than the system maximum, then you can upgrade your machine to 16GB of RAM. And don't forget, we can offer you cash back for your old RAM!

If you would like information about your Mac Pro, Mac mini, or MacBook Air, go to Part 2.

Is Your Mac Ready for macOS Sierra (Part 2)?

Two weeks ago, we took a look at the MacBook, MacBook Pro and iMac series of machines in order to see what could be done in order to prepare for macOS Sierra. As mentioned before, 4GB of RAM is a minimum requirement, 8GB is recommended, and 16GB or more is ideal because it gives you enough room for most of your other applications.

See what a difference upgrading your RAM did for one of customers recently.

For the Mac Pro, Mac mini, and MacBook Air series, the models below are the oldest ones that still qualify for a macOS Sierra upgrade.

Mac Pro 5,1 - Introduced in June 2012

This Mac Pro 5,1 was released in Mid 2010. The maximum amount of RAM depends upon which machine you purchased. The published system maximum for the 12-Core machine is 64GB but it is widely known that 128GB works for this 8-slot machine but you must remember that all 16GB DIMMs must come from the same batch for them to work together. The published system maximum for the 4 and 6-Core machines is 32GB but it can actually accept up to 48GB in a tri-channel configuration (16GBx3).

Mac mini 4,1 - Introduced in June 2010

The published system maximum is 8GB of RAM but this Mac mini can accept up to 16GB. You should generally leave up to 64GB of storage for the new OS and seeing that this Mac mini originally came with only 320GB or 500GB of hard drive storage, this might also be a good opportunity to add a 1TB SSD with your memory. See our special offer on this performance package ($20 OFF when buying them together).

MacBook Air 3,1 - Introduced in October 2010

Regrettably, all MacBook Airs, including this one, are not user upgradable for RAM. However, seeing that this was originally sold with only a 64GB or 128GB of SSD storage, now would be a good time to upgrade your SSD for this machine. Our 500GB SSD can be installed in a matter of minutes and we provide you a free enclosure for making use of your old one.

How to find your Mac's Model ID

Are you confused about how to identify your Apple machine? One of the most effective ways is to find your Model Identifier. For example, the most recent release of the 27' iMac is the Late 2015 version and has the Model ID 17,1.

If you're not sure, we can help by following these three easy steps.

Step 1: Click on the Apple menu in your toolbar, then click on 'About This Mac.'
Step 2: On the About This Mac screen, click on the 'System Report...' button.
Step 3: The second line listed will be your Model Identifier (Model ID).

OS Yosemite - Addressing Poor System Performance

Our customers frequently mention that their machines are performing poorly after upgrading to Yosemite. If you’ve recently upgraded your Mac to OSX Yosemite, we’ve got a few tips to keep your machine performing at its best.

As you may know, upgrading your memory is the most affordable and effective improvement you can make to your Mac. With Ramjet, we make the process easy and convenient. Simply head over to our site, find your Mac’s Model ID, choose your memory size, and select the option that’s best for you. If you need a recommendation, we’re happy to help!

Memory. Yosemite requires a LOT of memory compared to previous versions of Mac OSX. Yosemite requires 3.75GB of RAM for the operating system alone! If you have less than 4GB of RAM, a memory upgrade will offer a massive improvement in performance.

Reduce transparency. This appearance enhancement to Yosemite requires a shocking amount of system resources. Other than upgrading the RAM, reducing transparency is the single biggest improvement you can make in system performance under Yosemite. Reduce window transparency by clicking Apple > System Preferences > Accessibility, and check “Reduce Transparency.”

Clear your desktop. It's common for desktops to become cluttered, as it’s the most convenient place to put frequently accessed files. However, did you know that all items on the desktop occupy valuable system memory? Clearing up the clutter can be the key to substantial performance improvements.

Disable widgets. Widgets are mini-programs or extensions that can be useful when you need them, but can drastically bog down your machine. Disable these by clicking Apple > System Preferences > Extensions > Today, and uncheck all the options you don’t care to see.

Turn off minimize window genie effect. Another visual effect in Yosemite that can slow things down is the minimize window genie effect. Turn this effect off by clicking Apple > System Preferences > Dock and next to “minimize windows using” select “Scale Effect.”

Keep an eye on the activity monitor. The activity monitor on your computer will tell you which programs are using the most memory. To access Activity Monitor, open a new Finder window and click Application > Utilities > Activity Monitor > Memory. If you have programs open that you aren’t using, they may be slowing you down. Many Mac users cite the Google Chrome Helper plugin as a culprit.

Another great option for improving performance in older Macs is replacing your conventional hard drive with a Solid State Drive. Ever wonder why the new mac portables perform pretty well even though they have low speed processors? SSD storage is the key. Now you can have the same blazing fast performance for a fraction of the new machine price.

OS Yosemite - How Much RAM Do I Need For Macs?

The new OS X Yosemite has been touted as an elevated experience from previous OS. The design updates, simplified interface, and overall refinement are meant to provide the best user experience. With all these great new upgrades, OS Yosemite is sure to impress. But, before you upgrade, it’s important to make sure your machine is ready too.

After working with OS Yosemite, it appears the upgrades to the user experience do require increased amounts of memory. Ramjet+, a Ramjet Labs exclusive, tests Mac models to determine the maximum amount of RAM that can be installed. Many times this number surpasses Apple specs giving your upgraded device increased speed and performance. Higher performance is just an upgrade away - increasing memory to 4GB or 6GB will significantly increase performance in OS Yosemite.
Minimum requirements for upgrading to OS Yosemite as indicated by Apple are 2GB of RAM and 8GB of available storage space. To check how much RAM your Mac currently has, click on your Apple menu in the upper left-hand corner and click 'About This Mac'. The line that reads ‘Memory’ will tell you if your Mac has the necessary 2GB of RAM or if you will need to upgrade before you can install OS Yosemite.
Increase Speed for Older Models
For older machines, there are a number of troubleshooting suggestions that can ensure OS Yosemite is running quickly and smoothly. One of the most effective is disabling extraneous widgets and extensions. By accessing the Apple Menu > System Preferences > Extensions and deselecting options like Weather and Stock updates, the notifications panel will not need to be refreshed continually, increasing overall speed.

Alternatively, simple desktop cleanup can increase load time as each icon requires memory to store and load each time the Mac is rebooted or files are accessed. Utilizing external storage options, like Ramjet’s Thunderbolt Storage, can also be used to free up storage space on your bootable drive and increase user experience. Simple file organization and re-distribution can go a long way for increasing usability on any OS, and Yosemite is no exception.

Accessing the Activity Monitor (Command+Spacebar > Search “Activity Monitor”) will allow users access to information regarding CPU, memory or disk I/O. Apps, windows, and web pages that appear to be using more system memory than normal should be exited to free up space and increase speed. Keep in mind, some programs including mds and mdsworker will use significant amounts of CPU - this is normal as these programs will be running as they index hard drives. These should be left to run their course.

Read on to find out if your Mac's Model ID can upgrade to OS Yosemite.

Choose your iMac model

If you're not sure which iMac you have, you can identify your iMac and then select it from the list below.

27-inch

24-inch

21.5-inch

• iMac (Retina 4K, 21.5-inch, 2019)*
• iMac (Retina 4K, 21.5-inch, 2017)*
• iMac (21.5-inch, 2017)*
• iMac (21.5 inch, Mid 2014)*
• iMac (21.5-inch, Late 2013)*
• iMac (21.5-inch, Late 2012)*

20-inch

17-inch

* Memory is not removable by users on iMac (21.5-inch, Late 2012), iMac (21.5-inch, Late 2013), iMac (21.5-inch, Mid 2014), iMac (21.5-inch, 2017), iMac (Retina 4K, 21.5-inch, 2017), and iMac (Retina 4K, 21.5-inch, 2019). If the memory in one of these computers needs repair service, contact an Apple Retail Store or Apple Authorized Service Provider. If you’d like to upgrade the memory in one of these models, an Apple Authorized Service Provider can help. Before you schedule an appointment, confirm that the specific Apple Authorized Service Provider offers memory upgrade services.

Memory in iMac (21.5-inch, Late 2015), and iMac (Retina 4K, 21.5-inch, Late 2015) is not upgradeable.

iMac (Retina 5K, 27-inch, 2020)

Get memory specifications for iMac (Retina 5K, 27-inch, 2020), then learn how to install memory in this model.

Memory specifications

This iMac model features Synchronous Dynamic Random-Access Memory (SDRAM) slots on the rear of the computer near the vents with these memory specifications:

For optimal memory performance, DIMMs should be the same capacity, speed, and vendor. Use Small Outline Dual Inline Memory Modules (SO-DIMM) that meet all of these criteria:

• PC4-21333
• Unbuffered
• Nonparity
• 260-pin
• 2666MHz DDR4 SDRAM

If you have mixed capacity DIMMs, see the install memory section for installation recommendations.

iMac (Retina 5K, 27-inch, 2019)

Get memory specifications for iMac (Retina 5K, 27-inch, 2019), then learn how to install memory in this model.

Memory specifications

This iMac model features Synchronous Dynamic Random-Access Memory (SDRAM) slots on the rear of the computer near the vents with these memory specifications:

Use Small Outline Dual Inline Memory Modules (SO-DIMM) that meet all of these criteria:

• PC4-21333
• Unbuffered
• Nonparity
• 260-pin
• 2666MHz DDR4 SDRAM

iMac (Retina 5K, 27-inch, 2017)

Get memory specifications for iMac (Retina 5K, 27-inch, 2017), then learn how to install memory in this model.

Memory specifications

This iMac model features Synchronous Dynamic Random-Access Memory (SDRAM) slots on the rear of the computer near the vents with these memory specifications:

Use Small Outline Dual Inline Memory Modules (SO-DIMM) that meet all of these criteria:

• PC4-2400 (19200)
• Unbuffered
• Nonparity
• 260-pin
• 2400MHz DDR4 SDRAM

iMac (Retina 5K, 27-inch, Late 2015)

Get memory specifications for iMac (Retina 5K, 27-inch, Late 2015), then learn how to install memory in this model.

Memory specifications

This iMac model features Synchronous Dynamic Random-Access Memory (SDRAM) slots on the rear of the computer near the vents with these memory specifications:

Use Small Outline Dual Inline Memory Modules (SO-DIMM) that meet all of these criteria:

• PC3-14900
• Unbuffered
• Nonparity
• 204-pin
• 1867MHz DDR3 SDRAM

For these 27-inch models

Get memory specifications for the following iMac models, then learn how to install memory in them:

• iMac (Retina 5K, 27-inch, Mid 2015)
• iMac (Retina 5K, 27-inch, Late 2014)
• iMac (27-inch, Late 2013)
• iMac (27-inch, Late 2012)

Memory specifications

These iMac models feature Synchronous Dynamic Random-Access Memory (SDRAM) slots on the rear of the computer near the vents with these memory specifications:

Use Small Outline Dual Inline Memory Modules (SO-DIMM) that meet all of these criteria:

• PC3-12800
• Unbuffered
• Nonparity
• 204-pin
• 1600MHz DDR3 SDRAM

Installing memory

The internal components of your iMac can be warm. If you've been using your iMac, wait ten minutes after shutting it down to let the internal components cool.

After you shut down your iMac and give it time to cool, follow these steps:

1. Disconnect the power cord and all other cables from your computer.
2. Place a soft, clean towel or cloth on the desk or other flat surface to prevent scratching the display.
3. Hold the sides of the computer and slowly lay the computer face-down on the towel or cloth.
4. Open the memory compartment door by pressing the small grey button located just above the AC power port:
5. The memory compartment door will open as the button is pushed in. Remove the compartment door and set it aside:
6. A diagram on the underside of the compartment door shows the memory cage levers and the orientation of the DIMM. Locate the two levers on the right and left sides of the memory cage. Push the two levers outward to release the memory cage:
7. After the memory cage is released, pull the memory cage levers toward you, allowing access to each DIMM slot.
8. Remove a DIMM by pulling the module straight up and out. Note the location of the notch on the bottom of the DIMM. When reinstalling DIMMs, the notch must be oriented correctly or the DIMM won't fully insert:
9. Replace or install a DIMM by setting it down into the slot and pressing firmly until you feel the DIMM click into the slot. When you insert a DIMM, make sure to align the notch on the DIMM to the DIMM slot. Find your model below for specific installation instructions and notch locations:
   • iMac (Retina 5K, 27-inch, 2020) DIMMs have a notch on the bottom, slightly left of the middle. If your DIMMs are mixed in capacity, minimize the capacity difference between Channel A (slots 1 and 2) and Channel B (slots 3 and 4) when possible.
     
   • iMac (Retina 5K, 27-inch, 2019) DIMMs have a notch on the bottom, slightly left of the middle:
   • iMac (27-inch, Late 2012) and iMac (Retina 5K, 27-inch, 2017) DIMMs have a notch on the bottom left:
     
   • iMac (27-inch, Late 2013) and iMac (Retina 5K, 27-inch, Late 2014, Mid 2015, and Late 2015) DIMMs have a notch on the bottom right:
     
10. After you install all of your DIMMs, push both memory cage levers back into the housing until they lock into place:
    
11. Replace the memory compartment door. You don't need to press the compartment door release button when replacing the compartment door.
12. Place the computer in its upright position. Reconnect the power cord and all other cables to the computer, then start up the computer.
    

Your iMac performs a memory initialization procedure when you first turn it on after upgrading memory or rearranging DIMMs. This process can take 30 seconds or more, and the display of your iMac remains dark until it's finished. Make sure to let the memory initialization complete.

For these 27-inch and 21.5-inch models

Get memory specifications for the following iMac models, then learn how to install memory in them:

• iMac (27-inch, Mid 2011)
• iMac (21.5-inch, Mid 2011)
• iMac (27-inch, Mid 2010)
• iMac (21.5-inch, Mid 2010)
• iMac (27-inch, Late 2009)
• iMac (21.5-inch, Late 2009)

Memory specifications

Use Small Outline Dual Inline Memory Modules (SO-DIMM) that meet all of these criteria:

i5 and i7 Quad Core iMac computers come with both top memory slots populated. These computers will not start up if only a single DIMM is installed in any bottom slot; these computers should operate normally with a single DIMM installed in any top slot.

Core Duo iMac computers should operate normally with a single DIMM installed in any slot, top or bottom. ('Top' and 'bottom' slots refer to the orientation of the slots in the pictures below. 'Top' refers to the slots closest to the display; 'bottom' refers to the slots closest to the stand.)

Installing memory

The internal components of your iMac can be warm. If you've been using your iMac, wait ten minutes after shutting it down to let the internal components cool.

After you shut down your iMac and give it time to cool, follow these steps:

1. Disconnect the power cord and all other cables from your computer.
2. Place a soft, clean towel or cloth on the desk or other flat surface to prevent scratching the display.
3. Hold the sides of the computer and slowly lay the computer face-down on the towel or cloth.
4. Using a Philips screwdriver, remove the RAM access door in the bottom of your computer:
   
5. Remove the access door and set it aside.
6. Untuck the tab in the memory compartment. If you're replacing a memory module, gently pull the tab to eject any installed memory module:
   
7. Insert your new or replacement SO-DIMM into the empty slot, noting the orientation of the keyway of the SO-DIMM as shown below.
8. After you insert it, press the DIMM up into the slot. There should be a slight click when you seat the memory correctly:
   
9. Tuck the tabs above the memory DIMMs, and reinstall the memory access door:
   
10. Place the computer in its upright position. Reconnect the power cord and all other cables to the computer, then start up the computer.

For these 24-inch and 20-inch models

Get memory specifications for the following iMac models, then learn how to install memory in them:

• iMac (24-inch, Early 2009)
• iMac (20-inch, Early 2009)
• iMac (24-inch, Early 2008)
• iMac (20-inch, Early 2008)
• iMac (24-inch Mid 2007)
• iMac (20-inch, Mid 2007)

Memory specifications

These iMac computers have two side-by-side Synchronous Dynamic Random-Access Memory (SDRAM) slots in the bottom of the computer.

The maximum amount of random-access memory (RAM) you can install in each computer is:

You can use a 1GB or 2GB RAM module in each slot for iMac (Mid 2007) and iMac (Early 2008). Use 1GB, 2GB, or 4GB modules in each slot for the iMac (Early 2009).

Use Small Outline Dual Inline Memory Modules (SO-DIMM) that meet all of these criteria:

DIMMs with any of the following features aren't supported:

• Registers or buffers
• PLLs
• Error-correcting code (ECC)
• Parity
• Extended data out (EDO) RAM

Installing memory

The internal components of your iMac can be warm. If you've been using your iMac, wait ten minutes after shutting it down to let the internal components cool.

After your iMac cools down, follow these steps:

1. Disconnect the power cord and all other cables from your computer.
2. Place a soft, clean towel or cloth on the desk or other flat surface to prevent scratching the display.
3. Hold the sides of the computer and slowly lay the computer face-down on the towel or cloth.
4. Using a Philips screwdriver, remove the RAM access door in the bottom of the computer:
   
5. Remove the access door and set it aside.
6. Untuck the tab in the memory compartment. If you're replacing a memory module, untuck the tab and pull it to eject any installed memory module:
   
7. Insert your new or replacement RAM SO-DIMM into the empty slot, noting the orientation of the keyway of the SO-DIMM as shown above.
8. After you insert it, press the DIMM up into the slot. There should be a slight click when you seat the memory correctly.
9. Tuck the tabs above the memory DIMMs, and reinstall the memory access door:
   
10. Place the computer in its upright position. Reconnect the power cord and all other cables to the computer, then start up the computer.

For these 20-inch and 17-inch models

Get memory specifications for the following iMac models, then learn how to install memory in them:

• iMac (20-inch Late 2006)
• iMac (17-inch, Late 2006 CD)
• iMac (17-inch, Late 2006)
• iMac (17-inch, Mid 2006)
• iMac (20-inch, Early 2006)
• iMac (17-inch, Early 2006)

Memory specifications

For best performance, fill both memory slots, installing an equal memory module in each slot.
*iMac (Late 2006) uses a maximum of 3 GB of RAM.

Installing memory in the bottom slot

The internal components of your iMac can be warm. If you've been using your iMac, wait ten minutes after shutting it down to let the internal components cool.

After you shut down your iMac and give it time to cool, follow these steps:

1. Disconnect the power cord and all other cables from your computer.
2. Place a soft, clean towel or cloth on the desk or other flat surface to prevent scratching the display.
3. Hold the sides of the computer and slowly lay the computer face-down on the towel or cloth.
4. Using a Phillips screwdriver, remove the RAM access door on the bottom of the iMac and set it aside:
   
5. Move the DIMM ejector clips to their fully open position:
   
6. Insert your RAM SO-DIMM into the bottom slot, keeping in mind the orientation of the keyed SO-DIMM:
   
7. After you insert it, press the DIMM up into the slot with your thumbs. Don't use the DIMM ejector clips to push in the DIMM, as this might damage the SDRAM DIMM. There should be a slight click when you seat the memory fully.
8. Close the ejector clips:
   
9. Reinstall the memory access door:
   
10. Place the computer in its upright position. Reconnect the power cord and all other cables to the computer, then start up the computer.

Ddr Ram For Mac

Replacing memory in the top slot

Ddr3 Ram For Mac

After you shut down your iMac and give it time to cool, follow these steps:

1. Disconnect the power cord and all other cables from your computer.
2. Place a soft, clean towel or cloth on the desk or other flat surface to prevent scratching the display.
3. Hold the sides of the computer and slowly lay the computer face-down on the towel or cloth.
4. Using a Phillips screwdriver, remove the RAM access door on the bottom of the iMac and set it aside:
   
5. Pull the two levers on each side of the memory compartment to eject the memory module that's already installed:
   
6. Remove the memory module from your iMac as shown below:
   
7. Insert your RAM SO-DIMM into the top slot, noting the orientation of the keyed SO-DIMM:
   
8. After you insert it, press the DIMM up into the slot with your thumbs. Don't use the DIMM ejector clips to push in the DIMM, as this might damage the SDRAM DIMM. There should be a slight click when you seat the memory fully.
9. Close the ejector clips:
   
10. Reinstall the memory access door:
    
11. Place the computer in its upright position. Reconnect the power cord and all other cables to the computer, then start up the computer.

Ddr Memory For Macbook Pro

If your iMac makes a tone after you install memory

iMac models introduced before 2017 might make a warning sound when you start up after installing or replacing memory:

• One tone, repeating every five seconds signals that no RAM is installed.
• Three successive tones, then a five-second pause (repeating) signals that RAM doesn't pass a data integrity check.

If you hear these tones, confirm that the memory you installed is compatible with your iMac and that it's installed correctly by reseating the memory. If your Mac continues to make the tone, contact Apple Support.

Confirm that your iMac recognizes its new memory

Ddr Memory For Mac Computers

After you install memory, you should confirm that your iMac recognizes the new RAM by choosing Apple () menu > About This Mac.

Ddr Memory For Laptop

The window that appears lists the total memory, including the amount of memory that originally came with the computer plus the newly added memory. If all the memory in the iMac has been replaced, it lists the new total of all installed RAM.

For detailed information about the memory installed in your iMac, click System Report. Then choose Memory under the Hardware section in the left side of System Information.

If your computer doesn't recognize the memory or doesn't start up correctly, confirm that the RAM you installed is compatible with your iMac and that it's installed correctly by reseating the memory. If you continue to have issues with the memory in your iMac, contact Apple Support.