In addition to Xcode 4 or higher, you need Mac OS X 10.7 or higher to compile UnitKit.
For test suites written with UnitKit, either Mac OS X 10.7 or higher, or iOS 7 or higher are required to run them.
For a simple build, open UnitKit.xcodeproj and choose ukrun in the Scheme menu.
To install in /Library/Frameworks, do the build in the shell:
sudo xcodebuild -target ukrun -configuration Release clean install
For runnings the tests that comes with UnitKit, open UnitKit.xcodeproj and choose TestUnitKit or TestUnitKit (iOS) in the Scheme menu.
Give us feedback! Tell us what you like; tell us what you think could be better. Send bug reports and patches with https://github.com/etoile/UnitKit.