Attention Mac OS X Users:
Under rare circumstances, installing an iZotope product or demo and then applying any Mac OS X 10.6 update can cause some computers to experience problems booting. We have identified the cause of this issue and have provided a simple fix below.
Please download and install this patch immediately, even if you have not experienced any issues at this time. Also, make sure you delete and re-download the latest iZotope installers for Mac OS X. Please note that as of today (May 7, 2010), all of the Mac OS X installers on the iZotope website have been updated so that they no longer cause this issue to occur.
iZotope Mac OS X 10.6 Patch
If you suspect your computer has already been affected by this issue and you are unable to boot your computer, please follow the steps to fix in the iZotope Knowledge Base.