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El Bachir Boudih5,791 Points
Yosemite and Xcode 7.2.1
Not a question but if you're on Yosemite (10.10.5) and you can't/don't want to upgrade to El Capitan you can find older version of Xcode at https://developer.apple.com/download/more . You only need an Apple ID not an Developer Account.
For 10.10.5 you can install up to 7.2.1 version (4 Go to download and around 10 Go installed). It's long to install.
I'm just sharing this in case you find yourself in the same place than me (old macbook are not very upgrade friendly). (please if it's not the right place for this delete/move it)