How to Remove the Stand From a 24-Inch iMacby K.C. Winslow
The 24-inch iMac comes with a built-in stand. You can remove this stand and add a VESA mount adapter to use the iMac with VESA-compliant mounts. VESA-compliant mounts are the industry-standard mounts for electronics equipment such as HDTVs and computer monitors. The VESA Mount Adapter Kit includes the tools you need to remove the stand from a 24-inch iMac.
Turn off the computer and disconnect all cords and cables.
Move the computer to a flat work surface. Position the iMac so you are facing the back of the computer. Hold the stand base with one hand and push gently on the top of the iMac so the screen rotates down as far as it can go.
Insert the access card from the Adapter Kit in the space above the stand. It will go in at an upward angle for about ¾ of an inch to release the latch. If the access card goes in further, you will need to try again.
Push the top of the iMac forward so that the screen rotates down another 10 degrees. Stop when you see the heads of eight screws and the stand locks into place. Only after the stand locks into position should you hold the computer by the sides and carefully lay it down with the screen resting on the soft cloth or towel. Allow the bottom of the stand to hang over the edge of the work surface.
Insert the TORX tool into one of the screw heads you revealed on the back of the iMac. Turn the tool in a counterclockwise direction until the screw comes out. Repeat with the remaining screws.
Lift the stand up from the back of the computer to remove it.