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Xcode 10
https://download.developer.apple.com/Developer_Tools/Xcode_10/Xcode_10.xip
Xcode 9.4
https://download.developer.apple.com/Developer_Tools/Xcode_9.4/Xcode_9.4.xip
Xcode 9.3
http://adcdownload.apple.com/Developer_Tools/Xcode_9.3/Xcode_9.3.xip
Xcode 8.3.1
http://adcdownload.apple.com/Developer_Tools/Xcode_8.3.1/Xcode_8.3.1.xip
Xcode 8.2.1
http://adcdownload.apple.com/Developer_Tools/Xcode_8.2.1/Xcode_8.2.1.xip
Xcode 8.2
http://adcdownload.apple.com/Developer_Tools/Xcode_8.2/Xcode_8.2.xip
Xcode 8.0
http://adcdownload.apple.com/Developer_Tools/Xcode_8/Xcode_8.xip