Hi Wepeel and thanks for the guide, great job. I manage to get cDLC work on my Mac (Yosemite 10.10.2) but I have a problem with RSTookit : I can not start it. - I have installed Mono 3.10 , using wfaulk link. - I have download the latest RSToolkit using the link you provide (now is rev 838c30c3cb - 2015-04-01) - I have untar the 'Mac.tar.gz' file and obtained the 'RocksmithCustomSongToolkit.app' application. Now I can't start this app, my mac say something like 'application broken or incomplete' I have try other revs from RSToolkit download page ( rev ca31b7ec14 - 2015-03-31 and rev d27f290053 - 2015-03-19 ) and the result is the same, the app is broken. I have tryed to untar the files using guntar , same result. What I'm doing wrong ? Please help or give me a pointer, as I need to use RSTookit. There are so few cDLC for mac that converting from PC version is a must. Thanks in advance.