
iMac (Retina 5K, 27-inch, 2020) DIMMs have a notch on the bottom, slightly left of the middle.

Find your model below for specific installation instructions and notch locations: When you insert a DIMM, make sure to align the notch on the DIMM to the DIMM slot.
MAC MINI MEMORY UPGRADE 2010 INSTALL

After the memory cage is released, pull the memory cage levers toward you, allowing access to each DIMM slot.Push the two levers outward to release the memory cage: Locate the two levers on the right and left sides of the memory cage. A diagram on the underside of the compartment door shows the memory cage levers and the orientation of the DIMM.Remove the compartment door and set it aside: The memory compartment door will open as the button is pushed in.Open the memory compartment door by pressing the small grey button located just above the AC power port:.Hold the sides of the computer and slowly lay the computer face-down on the towel or cloth.

