I downloaded the FPC updeluxe for x86_64 cocoa, and ran it. First thing was an Access Violation.
Clicked OK to continue and got the attached screen.
I selected a directory (on the Desktop, for now), then clicked on Install/Update FPC+Laz and got told to select a version first...but from where?
So, I went to the Cross tab - ah, there are options. Selected i386 and Linux, then clicked on Install Compiler...Access violation, and nothing happened.
This is running from both the Downloads directory and moving into the same Applications directory as Lazarus itself - same result both times. I even tried the qt5 version, which gave even more Access violation errors.