🚀 go-pugleaf

My App doesn't compile under 3.0, why?

cc -g -O -Wall    -c DatabaseManager.m -o obj/DatabaseManager.o
cc -g -O -Wall    -c DBEmployee.m -o obj/DBEmployee.o
cc -g -O -Wall    -c DBRoom.m -o obj/DBRoom.o
cc -g -O -Wall    -c Employee.m -o obj/Employee.o
cc -g -O -Wall    -c EmployeePanel.m -o obj/EmployeePanel.o
/NextDeveloper/2.0CompatibleHeaders/defaults.h:1: warning:  Compatibility header file included - use <defaults/defaults.h>
/NextDeveloper/2.0CompatibleHeaders/mach.h:1: warning:  Compatibility header file included, use <mach/mach.h>
EmployeePanel.m: In method `registerWindow'
EmployeePanel.m:514: warning: cannot find method.
EmployeePanel.m:514: warning: return type for `registerWindow:toPort:' defaults to id
EmployeePanel.m: In method `unregisterWindow'
EmployeePanel.m:529: warning: cannot find method.
EmployeePanel.m:529: warning: return type for `unregisterWindow:' defaults to id
cc -g -O -Wall    -c EmployeesBrowser.m -o obj/EmployeesBrowser.o
cc -g -O -Wall    -c EmpRoomBrowser.m -o obj/EmpRoomBrowser.o
cc -g -O -Wall    -c ImageView.m -o obj/ImageView.o
cc -g -O -Wall    -c ImageWellView.m -o obj/ImageWellView.o
cc -g -O -Wall    -c InfoPanel.m -o obj/InfoPanel.o
/NextDeveloper/2.0CompatibleHeaders/defaults.h:1: warning:  Compatibility header file included - use <defaults/defaults.h>
/NextDeveloper/2.0CompatibleHeaders/mach.h:1: warning:  Compatibility header file included, use <mach/mach.h>
cc -g -O -Wall    -c Localization.m -o obj/Localization.o
Localization.m:5: header file 'appkit/defaults.h' not found
/NextDeveloper/2.0CompatibleHeaders/defaults.h:1: warning:  Compatibility header file included - use <defaults/defaults.h>
*** Exit 1
Stop.
*** Exit 1
Stop.