objective c - Cocoa/Xcode - OSX retrocompatibility -


I have written a coco app on my Mac, which is 10.6.6. I sent it to a friend who is 10.5.7 and got this error:

This app can not open this version of OSX

How can I re-process my app with a minimum 10.4 tiger?

Setting the Mac OS X Deployment Target in Your Target Building Settings for OS X 10.4 and do not use any 10.5 or 10.6-API without checking your availability.

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