XCTest
Fix the XCTest build project.
The extension was set to octest; it should have been xctest.
xctest
Dropping 10.6
Version bump
Replace use of -performSelector:withObject:
Replace deprecated GetProcessForPID.
Replace deprecated Gestalt.
Replace use of antiquated ProcessInformationCopyDictionary.
Modern syntax
Modern `if` syntax ;)

astyle -t -o -O -c -xM -z2 -U -j -H *.[mhc]
Refer to frameworks/libraries via their SDK versions, as opposed to the system ones.
Rename “Apple Frameworks and Libraries” to just “Frameworks” so newly added frameworks are added there.
Fix an over-release bug.