I have an old iMac (I think around 2008 or so) and am considering replacing it with a current iMac. My iMac sits on a computer desk between two side shelves which are spaced exactly 21.5” apart. The Apple specs for the current iMac say it is 21.5 inches wide but if you back convert from the metric specification, it comes out to be a little over 21.5 inches wide. So basically, in one case it is a close call. In another case it is a no go. For those of you with the current iMac, can you measure the width and let me know exactly (to the tenth of an inch) how wide it is? If it doesn’t fit I may put a riser under it so the bottom of the main body is above the side shelves. Thanks.