Don't connect the power cord or turn on your Mac mini until you replace the bottom cover. Never operate your Mac mini without the cover in place. After you install the memory, confirm that your Mac mini sees the new memory. If the reported memory size isn't correct or if your Mac mini repeatedly plays three tones, it may be having trouble recognizing a memory module.
If this happens, shut down your Mac mini, verify the module specifications against the requirements for your Mac mini model, and then repeat the memory installation instructions to make sure that the modules are installed correctly.
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If you still have issues, remove the memory and consult the support information that came with the memory, or contact the vendor who provided the memory. Upgrade or install memory in your Mac mini Learn how to remove or install memory into your Mac mini computer. Before you begin To minimize the possibility of damage to the computer components due to static discharge, it's important to wear an antistatic wrist strap while you work with your computer's memory. Choose your model Mac mini models have different memory RAM installation requirements.
Remove the bottom cover Turn off your Mac mini. Disconnect the power cord and all other cables from your Mac mini. Lay your Mac mini upside down on a soft cloth or towel, and then rotate the bottom cover counterclockwise to the unlocked position.
How to upgrade the memory of the Mac mini (Late 2012)
Press on the cover to pop up the opposite side, and then remove the cover. Remove the original memory modules Gently spread the clips at the ends of the top memory module just enough to let the free edge pop up.
Pull the module out of the slot. Repeat to remove the second, bottom module. Install the new memory Carefully press the notched edge of the new memory module into the bottom slot while keeping the opposite edge slightly raised. Press down on the raised edge until the clips snap into place. Repeat to install the top memory module. First, you should determine if your system's RAM is upgradable. In essence, if you have a Retina MacBook Pro, or a MacBook Air, the memory on the system is soldered to the motherboard and cannot be upgraded.
Otherwise, you should be able to upgrade your RAM.
Mac Mini Late 2012
Now you can purchase new RAM for your system. While 4GB is a general minimum, if your system can handle it, then install at least 8GB, but more is preferred. For computing, in general the more RAM you have, the better. If you are uncertain how much memory your system can handle, then the following Apple knowledge base documents should show you the capacities of your system:. These documents also contain a number of images outlining how to install upgrades on your system, but in general, once you have exposed the RAM slots per the above articles' instructions, you unlatch and remove the old RAM and then fit the new RAM in its place.
While you might be concerned about whether RAM is seated properly, keep in mind that you cannot easily damage RAM or your system if it is not properly seated. At most, when your system boots up it will not be able to detect and test the RAM, and will issue three beeps without booting, or will boot and not show the RAM as being available.
Even though improper seating cannot easily damage RAM, do keep in mind that static electric discharges to it can damage it. Therefore, when opening and installing new RAM, regularly touch the system to ground yourself to it, and use a static-free surface like a wood or glass desk.
While some vendors may try to sell Mac-specific RAM, you can use any that matches the requirements for your system. In doing so, you can avoid places that sell "Mac RAM" at a premium.
How to upgrade the memory of the Mac mini (Late )
After upgrading, be sure to run Apple's hardware test suite to check the new RAM for errors. This is perhaps the most important step of any RAM upgrade, since corruption in RAM can result in crashes, hangs, and data corruption. In addition, RAM errors can go unnoticed for a while, and then suddenly start to affect the system.