A Universal Binary version of Renoise v1.5.2 for Mac OS X has been released - Renoise now supports both PowerPC- and Intel-Macintosh computers. If you have an Intel Macintosh, you can expect Renoise to run faster.
There have been no changes besides the optimization for Macintosh hardware. If you are a registered user, you can get this update right now at Renoise Backstage. The free demo version will be available in a few days.