About Logic Pro 9.1.3
This update delivers improved general stability and compatibility.

Issues addressed with 9.1.3 include:

Resolves problems related to the support of Hyper-Threading
Issues addressed with 9.1.2 include:

Improved compatibility with 6 and 12-core Mac Pro systems
Support for iOS control surface apps that utilize the OSC protocol
REX files now supported in 64-bit mode
Improved compatibility with select Audio Unit plug-ins

The update is recommended for all users of Logic Pro 9.

Logic Pro 9.1.3 update details

• Resolves an issue introduced in Logic 9.1.2 where Logic might quit unexpectedly when opening if the Native Instruments Kontakt 4 Memory Server was already open.
• Resolves an issue introduced in Logic 9.1.2 where the Pedalboard stompboxes “Classic Wah” and “Modern Wah” sometimes stopped responding to mouse input.
• Logic will no longer stop responding during launch if the TouchOSC Control Surface plug-in is being used and the utility application from Objective Development called Little Snitch is configured to deny network access to Logic.
• Resolves an issue in Logic 9.1.2 that caused Logic to open fewer audio processing threads on i7 Quad-core Mac computers than it did in 9.1.1.
• Resolves an issue in Logic 9.1.2 where flattening and merging a Take Folder could result in an empty audio region if another track was soloed during the operation.