i just downloaded and installed this mono again The latest Mono release is: 4.6 Service Release 0.1 (4.6.1.5)and then i downloaded again the older one toolkit, nothing happens : Last login: Mon Nov 7 17:49:18 on ttys000 Mikko-MacBook-Pro:~ mikko$ /Users/mikko/Downloads/RocksmithCustomSongToolkit.app/Contents/MacOS/RocksmithCustomSongToolkit ; exit; ln: ./RocksmithCustomSongToolkit: File exists /Users/mikko/Downloads/RocksmithCustomSongToolkit.app/Contents/MacOS/RocksmithCustomSongToolkit: line 35: ./bin/RocksmithCustomSongToolkit: No such file or directory logout Saving session... ...copying shared history... ...saving history...truncating history files... ...completed. [Prosessi valmis] and the new one : Latest release build - 2.7.0.0 (rev 6d0cdeda) Last login: Mon Nov 7 17:53:39 on ttys001 Mikko-MacBook-Pro:~ mikko$ /Users/mikko/Downloads/RocksmithCustomSongToolkit\ 2.app/Contents/MacOS/RocksmithCustomSongToolkit ; exit; /Users/mikko/Downloads/RocksmithCustomSongToolkit 2.app/Contents/MacOS/RocksmithCustomSongToolkit: line 38: mono: command not found same result nothing starts.. sorry im a mac noob