在这里有Xcode历史版本的所有下载方式:https://developer.apple.com/downloads/
下面罗列几个版本你的下载地址:
Xcode7.1.1 :http://adcdownload.apple.com/Developer_Tools/Xcode_7.1.1/Xcode_7.1.1.dmg
Xcode7.1 :http://adcdownload.apple.com/Developer_Tools/Xcode_7.1/Xcode_7.1.dmg
Xcode7.0.1 :http://adcdownload.apple.com/Developer_Tools/Xcode_7.0.1/Xcode_7.0.1.dmg
Xcode_7 :http://adcdownload.apple.com/Developer_Tools/Xcode_7/Xcode_7.dmg
Xcode6.4:http://adcdownload.apple.com/Developer_Tools/Xcode_6.4/Xcode_6.4.dmg
Xcode6.3.2:http://adcdownload.apple.com/Developer_Tools/Xcode_6.3.2/Xcode_6.3.2.dmg
Xcode6.3.1:http://adcdownload.apple.com/Developer_Tools/Xcode_6.3.1/Xcode_6.3.1.dmg
Xcode6.3:http://adcdownload.apple.com/Developer_Tools/Xcode_6.3/Xcode_6.3.dmg
所有版本均为正式版。Beta版的Xcode打的包是不能发布到商店的。