With the introduction of Mac OS X Lion (10.7), Apple dropped support for Rosetta. As a result of this change, Cakewalk instruments and audio effects for Mac have been affected. As of this time, Dimension Pro, Dimension LE, Rapture, Rapture LE, Studio Instruments and the Production Packs are not officially supported on Mac OS X Lion (10.7) or greater.

When it comes to Cakewalk branded hardware, the drivers and firmware for these products are created and maintained by Roland. Some products are already supported, and others are not.

Roland is maintaining a helpful list of compatible hardware devices on their website here. Please refer to this link for any official status updates regarding hardware compatibility with OS X Lion.