This forum is for Audacity 2.x on Mac OS X 10.4 and later.
Please state which version of OS X you are using, the exact three-section version of Audacity from Audacity > About Audacity and whether you obtained the .dmg installer or the zip.
Audacity 1.2.x and 1.3.x are obsolete and no longer supported. If you still have those versions, please upgrade at http://audacityteam.org/download
The old forums for those versions are now closed, but you can still read the archives of the 1.2.x