Jonas,
You're right. I checked SVN for FPC 3.2.0. Yes, they use ObjCBool for NSWindow and for other units.
I checked my files. It seems that FPC 3.2.0 Sources was installed wrongly for this folder suggested by default:
/usr/local/share/fpcsrc/3.2.0
keeping old FPC 3.0.4 sources in:
/usr/local/share/fpcsrc/
So Lazarus reads old FPC sources from /usr/local/share/fpcsrc
It occured on both my Macs after upgrading Lazarus 2.0.6 + fpc 3.0.4 to 2.0.10 + fpc 3.2.0
Solution: I removed /fpcsrc folder and re-installed FPC 3.2.0 sources.