Chosen Solution
I have a late 2015 model Retina iMac with a 27 inch display. The iMac was purchased direct from Apple with a VESA mount pre-installed. The mount is secured to the iMac with two pentalobe screws. Does anybody know what size pentalobe screw’s are used on this model iMac?
Image of VESA bracket EDIT, 02/11/16 @ 16:36
I have a desk mount which is designed to attach to an iMac both with and without the VESA bracket installed. Without the VESA bracket is a much neater solution because the mount attaches directly to the metal bar which the VESA bracket would normally be secured to. Officially this mode only works with pre-2012 iMac’s where the desk stand could be removed; however I see no reason why I couldn’t remove the VESA bracket installed by Apple and attach the desk mount. That is unless there are additional screws which are not accessible from the outside of the iMac.
The bracket piece is needed! And it needs to be a VESA mount. I have not seen any desk mounts that worked without a VESA mount or without the complete foot assembly present on the system for any of the newer ‘Thin Series’ iMac’s. I suspect the CodyTech mount is similar to the NuMount Pivot Desk Mount which is described here: NewerTech - NuMount Pivot Desk Mount. If you download the PDF you’ll see they have a custom piece that replaces the foot like Apples VESA mount but offers a smaller profile. As you don’t have the same mounting as the older iMac’s and the piece that you do have on your system now is not going to allow you to mount the CodyTech unit as the screw alignment and height are different. Again, remember this was for the older models not this series. Here’s the VESA mount we had used on some of our older systems
You might want to reach out and talk with them to see if having just the tail piece installed if there is a way to get it to work otherwise you’ll need to try it your self. Here is the special frame to connect to VESA by mounting via the cable hole in the foot: VIVO STAND-MACB VESA adapter for iMac. The other option which some people have done is to drill & tap the foot to mount the VESA unit. Here’s a YouTube vid: 21.5" Wall Mount. In any case I wouldn’t try replacing the VESA with a standard foot just to then use an adapter to remount it via a VESA mount that would be a waste.
You can get the tools at iFixIt store https://www.ifixit.com/Store/Tools/all?f…
Not without a complete teardown. You could have ordered it with it, @danj knows more about this than I do, maybe he will jump in here. Please see this answer: Is the stand removable? and iMac 5K VESA mount to standard stand