We have had two new iMac's delivered lately with El Capitan installed on them.
With the updates to AC18 now, it generally seems to work, but there is one thing that we are finding frustrating.
The tracker and coordinate input box does not pop up when we start moving items.
We also can not use the tab selection option to select different items in the same place as the tracker does not show up to tell us what we are possibly selecting.
Works OK in version 19 but not 18 which all of our projects are on.
27" iMac 3.6 Ghz Intel Core i9
32 Gig Ram
Mac OSX 10.14.6
AC 5.5 - AC22 (NZE)