Logic 9.1.2 HT Quad i7 performance solution!
Just got that from AppleCare:
They are aware of the performance problem on certain machines in certain setups and working on a solution. However you can enable the virtual cores on all Quad Core machines with this commandline in Logic 9.1.2!
Open Terminal.app from /Applications/Utilities and copy the following line into the window and press return:
defaults write com.apple.logic.pro MD_AllowVirtualCoresQuad -bool yes
You can then quit Terminal.app. Relaunch Logic and you should have twice the number of processing threads.
Warning: this preference can actually lower your performance or have a negative impact on stability (e.g. you get audio engine overloads). In this case you can disable it by using the following line in Terminal.app:
defaults write com.apple.logic.pro MD_AllowVirtualCoresQuad -bool no
They are aware of the performance problem on certain machines in certain setups and working on a solution. However you can enable the virtual cores on all Quad Core machines with this commandline in Logic 9.1.2!
Open Terminal.app from /Applications/Utilities and copy the following line into the window and press return:
defaults write com.apple.logic.pro MD_AllowVirtualCoresQuad -bool yes
You can then quit Terminal.app. Relaunch Logic and you should have twice the number of processing threads.
Warning: this preference can actually lower your performance or have a negative impact on stability (e.g. you get audio engine overloads). In this case you can disable it by using the following line in Terminal.app:
defaults write com.apple.logic.pro MD_AllowVirtualCoresQuad -bool no
