Logic 9.1, i open the info window an uncheck the 32Bits, restart and open Logic and in the boot window it show 64Bit. Next i open the 9.2 version get info and no more 64Bit, i check in About this Mac in Application and i see 9.1 64Bit and 9.2 32Bit and if i do a file info on the 9.2 there is no check 32 Bits window to uncheck it look strange Alrobi

Forget the question, How come Logic 9.1 it is 64Bit and the update to 9.2 will loose the 64bit

Hi Alrobi, I think you may have confused the numbering system here. Logic 9.0.1 = 32 bit only Logic 9.0.2 = 32bit only Logic 9.1.0 = 32 bit/64 bit by the way you require Snow Leopard (10.6.2 or greater) to be able to run Logic 9.1 in 64 bit mode. Hope that helps Rounik

You are again exact i do not figure it the good way what i read and what i understand was wrong, by the way Rounik i tried a previous file built before update and it is work perfectly fine in the 9.1 64bit, so is it ok and how to delete the 9.0.2 Thank you

No probs Alrobi! If you want to delete the Logic 9.0.2 app then simply go to the Applications folder and drag the 9.0.2 version of logic.app to the Trash. You'll save about 700MB of space. :) Rounik