Hi, I've created a bounty of USD $3000 for completion of Cocoa widgetset.
http://wiki.lazarus.freepascal.org/Bounties#Cocoa_bounties
I would suggest you create the test app now as a way for prospective candidates to review and note what doesn't work and what needs to be done. "Completion of Cocoa widgetset" is completely open-ended and probably unrealistic for that budget amount.