Record, edit, and mix your music like a pro. Open your GarageBand files in Logic Express 9 and get right to work, or start from scratch with a new composition. Innovative production tools and over 100 instrument and effect plug-ins from Logic Studio make it easier than ever to translate musical inspiration into professional recordings.
More informations
http://www.apple.com/logicexpress/


Installation Instructions:

Run "Logic Express 9.dmg" and Install

If you choose your Logic Express to be Volume License version:
+ Open "Pro Apps 2009" folder, copy all the contents inside and paste it to Macintosh HD/Library/Application Support/ProApps
+ Overwrite all of them, now your Logic Express 9 becomes Volume License

If you choose your Logic Express to be Retail version:
+ Insert Serial Number
S/N: E-324-FOX-072-MTF-274-SLZ-412-EWS-MBQ-41GX