When installing the 3.7.8.6 build of FMX UI Pack into Delphi 11.3, it errors with a dialog stating "Build failed with one or more multiple compile errors"
Log file is fairly long, but here is one example of an error:
[C:\DevTools\TMSSoftware\TMS FMX UI Pack\TMSFMXPackPkgDXE14.dproj]
Linker command line: "C:\Program Files (x86)\Embarcadero\Studio\22.0\bin\ld.exe" -arch x86_64 -o C:\Users\Public\Documents\Embarcadero\Studio\22.0\Bpl\OSX64\bplTMSFMXPackPkgDXE14.dylib -e __ZN18Tmsfmxpackpkgdxe1414initializationEv -dead_strip -dead_strip_dylibs -mark_dead_strippable_dylib -exported_symbols_list C:\Users\Public\Documents\Embarcadero\Studio\22.0\Bpl\OSX64\TMSFMXPackPkgDXE14.exp -dylib -export_dynamic -S -x -macosx_version_min 10.9 -L "C:\Program Files (x86)\Embarcadero\Studio\22.0\redist\OSX64" -L "c:\program files (x86)\embarcadero\studio\22.0\lib\OSX64\release" -L C:\Users\efh20\Documents\Embarcadero\Studio\22.0\Imports\OSX64 -L "C:\Program Files (x86)\Embarcadero\Studio\22.0\Imports" -L C:\Users\Public\Documents\Embarcadero\Studio\22.0\Dcp\OSX64 -L "C:\Program Files (x86)\Embarcadero\Studio\22.0\include" -L C:\Users\Public\Documents\Embarcadero\Studio\22.0\Bpl\OSX64 -L C:\Users\efh20\Documents\Embarcadero\Studio\22.0\CatalogRepository\Abbrevia-2021.11-Alexandria\source -L C:\Users\efh20\Documents\Embarcadero\Studio\22.0\CatalogRepository\OnGuard-2021.09-11\source -rpath $ORIGIN -install_name @rpath/bplTMSFMXPackPkgDXE14.dylib -filelist C:\Users\Public\Documents\Embarcadero\Studio\22.0\Bpl\OSX64\TMSFMXPackPkgDXE14.lnk
C:\Program Files (x86)\Embarcadero\Studio\22.0\Bin\CodeGear.Delphi.Targets(412,5): error E2597: ld: warning: directory not found for option '-LC:\Users\efh20\Documents\Embarcadero\Studio\22.0\Imports\OSX64' [C:\DevTools\TMSSoftware\TMS FMX UI Pack\TMSFMXPackPkgDXE14.dproj]
ld: warning: directory not found for option '-L/usr/lib'
ld: warning: directory not found for option '-F/System/Library/Frameworks/'
ld: file not found: /usr/lib/libiconv.dylib
C:\Program Files (x86)\Embarcadero\Studio\22.0\Bin\CodeGear.Delphi.Targets(412,5): error F2588: Linker error code: 1 ($00000001) [C:\DevTools\TMSSoftware\TMS FMX UI Pack\TMSFMXPackPkgDXE14.dproj]
Done Building Project "C:\DevTools\TMSSoftware\TMS FMX UI Pack\TMSFMXPackPkgDXE14.dproj" (Build target(s)) -- FAILED.
Build FAILED.