Logic Pro 9.1.1
that update delivers improved compatibility and numerous fixes.
Issues addressed with 9.1.1 include:
Improved stability of the 32-Bit Audio Unit Bridge
Compatibility with Novation’s Automap feature in 64-bit mode.
Compatibility with Euphonix Eucon protocol in 64-bit mode.
Issues addressed with Logic Pro 9.1.0 include:
Support for 64-bit native mode
Compatibility with 64-bit Audio Unit plug-ins
File names with by 32 characters are now supported
Updated System Requirements
32-bit mode requires Mac OS X 10.5.7 or later
64-bit mode requires Mac OS X 10.6.2 or later
The update is recommended for all users of Logic Pro 9.
For detailed data on that update, including some restrictions when working in 64-bit mode, please visit that website: http://support.apple.com/kb/ts2565
Orginal post by Mike