This was posted a few days ago, but it must have fallen through the cracks. icculus.org, the UT2004 Mac developer website, has relased a new patch for Mac OSX, version 3369.2. The new patch's biggest feature is universal binaries and the inclusion of the Epic Mega Pack. There is not and will not be a windows or linux version of this patch as these issues are strictly mac-related. Check this announcement for mirrors