Hi,
We have 2 problems with installing fpc and Lazarus on a new iMac with Catalina:
1.
fpc-3.0.4a.intel-macosx.dmg is being refused by Catalina (10.15.3) stating it is an incompatible package.
2.
Another step described in wiki cannot be performed:
open /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg
Because there is no file macOS_SDK_headers_for_macOS_10.14.pkg