One of the requirements for Z3TA+ 2 for Mac is that the host application must support loading plug-ins via Cocoa UI architecture. Hosts that use older Carbon wrappers and do not support Cocoa plug-in architecture, such as 32-bit Maschine, will not load Z3TA+ 2 properly.
All 64-bit hosts will load Z3TA+ 2 via a Cocoa wrapper as this is one of the requirements for 64-bit support. If you are using a 64-bit host, your best bet is to use the 64-bit version of Z3TA+ 2.
Find answers to questions about Cakewalk products.