Memory upgrade information for each Mac model

RAMメモリー
Updated : Sep 17, 2021

Information on memory expansion is posted for each Mac model.

Information on the maximum memory size, number of memory slots, and supported memory specs will be provided based on whether or not memory can be upgraded.

How to use this page

As an example, we will explain using the following two types of Mac models.

First of all, the next model says “not upgradable”, so you cannot upgrade(add) memory after purchase.

Mac upgrade memory information

 

On the other hand, the following model can be upgraded with memory after purchase, so each item is described.

Mac upgrade memory information

 

The following is the content of each item.

①Model

Click the “Model” item to open the support page for that model on Apple’s official website.

First, you can check the “model” on the screen that appears when you select “About this Mac” from the menu bar when you start macOS (MacOS X).

About This Mac

About This Mac

 

In addition to the above methods, you can check the model from the Mac serial number at the following site.

Your Mac’s serial number is stamped on the back of your Mac or on the packaging box.

Check Your Service and Support Coverage - Apple Support
Check your Apple warranty status. Enter a serial number to review your eligibility for support and extended coverage.

 

②Max memory(Official)

③Max memory(Unofficial)

The maximum capacity of the official memory listed on Apple’s support page is ②.

On the other hand, ③ is the size of the memory that the user actually tried and recognized, though it was unofficial.

If there is no problem with the challenge, you can try ③, but if safety and security are the first priority, we recommend ②.

 

④Total memory slots

The total number of memory slots.

Check the number of empty slots as some slots have already been used.

Alternatively, you can replace all the installed memory with the same model number and size.

 

⑤Supported memory spec

Since the memory spec is determined for each Mac model, add it with a compatible memory.

 

iMac memory upgrade information

To upgrade memory to your iMac, there is a lid that can be removed with a screw at the bottom of the display or on the back of the display, so add it there.

 

Model

Max memory
(Official)

Max memory
(Unofficial)

Total memory slots

Supported
memory
spec

2 GB - 2 200pin PC2-5300 (DDR2-667MHz)
2 GB - 2 200pin PC2-5300 (DDR2-667MHz)
2 GB - 2 200pin PC2-5300 (DDR2-667MHz)
2 GB - 2 200pin PC2-5300 (DDR2-667MHz)
3GB
(installabe 4GB)
- 2 200pin PC2-5300 (DDR2-667MHz)
3GB
(installabe 4GB)
- 2 200pin PC2-5300 (DDR2-667MHz)
3GB
(installabe 4GB)
- 2 200pin PC2-5300 (DDR2-667MHz)
4 GB 6 GB 2 200pin PC2-5300 (DDR2-667MHz)
4 GB 6 GB 2 200pin PC2-5300 (DDR2-667MHz)
4 GB 6 GB 2 200pin PC2-6400 (DDR2-800MHz)

Model

Max memory
(Official)

Max memory
(Unofficial)

Total memory slots

Supported
memory
spec

4 GB 6 GB 2 200pin PC2-6400 (DDR2-800MHz)
8 GB - 2 204pin PC3-8500 (DDR3-1066MHz)
8 GB - 2 204pin PC3-8500 (DDR3-1066MHz)
8 GB - 2 204pin PC3-8500 (DDR3-1066MHz)
16GB - 4 204pin PC3-8500 (DDR3-1066MHz)
16GB 32 GB 4 204pin PC3-8500 (DDR3-1066MHz)
16GB - 4 204pin PC3-10600 (DDR3-1333MHz)
16GB 32 GB
(Core i5 / i7)
4 204pin PC3-10600 (DDR3-1333MHz)
16GB 32 GB 4 204pin PC3-10600 (DDR3-1333MHz)
16GB 32 GB 4 204pin PC3-10600 (DDR3-1333MHz)

Model

Max memory
(Official)

Max memory
(Unofficial)

Total memory slots

Supported
memory
spec

8 GB 16 GB 4 204pin PC3-10600 (DDR3-1333MHz)
not
upgradable
not
upgradable
not
upgradable
not
upgradable
32 GB - 4 204pin PC3-12800 (DDR3-1600MHz)
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
32 GB - 4 204pin PC3-12800 (DDR3-1600MHz)
not
upgradable
not
upgradable
not
upgradable
not
upgradable
32 GB - 4 204pin PC3-12800 (DDR3-1600MHz)
32 GB - 4 204pin PC3-12800 (DDR3-1600MHz)
not
upgradable
not
upgradable
not
upgradable
not
upgradable

Model

Max memory
(Official)

Max memory
(Unofficial)

Total memory slots

Supported
memory
spec

not
upgradable
not
upgradable
not
upgradable
not
upgradable
32 GB 64 GB 4 204pin PC3L-14900 (DDR3L-1866MHz)
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
64 GB - 4 260pin PC4-19200 (DDR4-2400MHz)
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
not
upgradable
64 GB 128 GB 4 260pin PC4-21333 (DDR4-2666MHz)
128 GB - 4 260pin PC4-21333 (DDR4-2666MHz)
not
upgradable
not
upgradable
not
upgradable
not
upgradable

 

Product information of additional memory

200pin PC2-5300 (DDR2-667MHz)

1GB


2GB


 

 

200pin PC2-6400 (DDR2-800MHz)

2GB


4GB


 

 

204pin PC3-8500 (DDR3-1066MHz)

2GB


4GB


 

 

204pin PC3-10600 (DDR3-1333MHz)

2GB


4GB


8GB


 

204pin PC3-12800 (DDR3-1600MHz)

2GB


4GB


8GB


 

204pin PC3L-14900 (DDR3L-1866MHz)

8GB


 

 

 

260pin PC4-19200 (DDR4-24000MHz)

4GB


8GB


16GB


32GB


 

 

 

260pin PC4-21333 (DDR4-26666MHz)

4GB


8GB


16GB


32GB


 

 

 

This is the end of the article on this page.

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