Grab the free iOS version for iPhone, iPad, and iPod touch.Grab the Mac version of MacTracker from the developer.

Conveniently, the app runs on both iOS and OS X, so download whichever version you prefer (again, it’s free): MacTracker is an excellent free app that provides tons of hardware details on just about every Apple product ever released, including Macs.

If for some reason you can’t boot the Mac, or if it’s older and doesn’t have memory details in System Information, you can use other options to find the RAM type, speed, and maximum capacity as well. If you have determined slots are available and the Mac can support more RAM, the most important information to know when ordering or looking for upgrade modules is the RAM module type and speed, which is always shown at the top of the “Memory” screen and labeled something like “Your Mac contains 4 memory slots, each of which accepts a 1333 MHz DDR3 memory module.” It’s the “1333 MHz DDR3” (or whatever it says) part that is most important to know: If the Mac is not upgradeable because RAM is either inaccessible to users or soldered onto the board, which is commonly the case for MacBook Air and Retina MacBook Pro models, then you will still find the RAM details, but there will be no available slots shown like so: Here’s an example showing a Mac with available slots:

Look under the “Memory” tab for information about your Mac RAM, including maximum capacity, used memory slots, and which type of RAM the Mac acceptsĪll Macs will show the maximum RAM, what size RAM modules are installed, if there are open memory slots, and the RAM speed used.

Click the “More Info…” button to summon System Information.

Pull down the Apple  menu and go to “About this Mac”.

The quickest way to find out RAM details of a Mac is to check About This Mac, which will identify the memory module type and speed, how many RAM slots there are on the Mac, and which slots are in use. 1: Check the Mac for RAM Type & Memory Slot Details

Max ram for 2012 macbook pro