RC on OS X is in really good shape. This week we fixed the remaining bugs (audio device selection and some VSTi plug-in compatibility), and probably the last beta will be uploaded this weekend. It will be released around April 16th.
Note: the version number will be v1.9 to be in sync with the PC version. All existing and new customers will get all v2.XX versions. The user interface will be totally redesigned for v2.0, so releasing v1.9 for the Mac is not the best timing, but we did not want to wait more with the OS X version.
Thanks,
Attila