Have a project that worked fine with 10.1 Berlin for the three target environments: Win32, Win64, and MacOS/OSX.
Load the project up in 10.2 Win32 and Win64 work fine, but MacOS/OSX version crashes during startup (before executing any of the .cpp files in the project). Thus have been unable to debug it.
As a further test: I created a blank project which works fine in all 3 (just to make sure everything is correct) started adding the same components to the FMX Form on the test project--everything worked...
2nd test: Create a blank FMX application and then add all the files from the original project to it. This results with the same crash as with the original application.
Looking at the stack trace the crash appears to be related to styles (there is no stylebook associated with the form, and even if one is added the application still crashes in MacOS/OSX).
My 10.2 is up to date (including the latest patch recently released).