X-Rite’s stock i1Profiler works alright, but they have this background agent that uses a lot(understatement, lol) of CPU time.
DisplayCal will only works if you manually install Argyll version 2.3, unpack it to
User->YourAccount->Library->Application Support -> Displaycal-> dl
Use the menu bar(also broken) and locate the new 2.3 bin folder, restart DisplayCal and do a test run, you will be prompt by Gatekeeper, which you will need to manually find the executable and do a right click open to “approve” the unsigned app. Close everything and do a test run again, and repeat each time you encounter an unsigned executable.
I gave up after awhile and did a select all right click open and terminate them manually.