使用app store的帳號登入後，直接敲地址可下載：（蘋果已經刪除了3.1.2以前的版本）iPhone SDK 3.1.3 with XCode 3.1.4 for Leopard (10.5.7)http://developer.apple.com/ios/download.action?path=/iphone/iphone_sdk_3.1.3__final/iphone_sdk_3.1.3_with_xcode_3.1.4__leopard__9m2809a.dmgiPhone SDK 3.1.3 with XCode 3.2.1 for Snow Leopard (10.6.0)http://developer.apple.com/ios/download.action?path=/iphone/iphone_sdk_3.1.3__final/iphone_sdk_3.1.3_with_xcode_3.2.1__snow_leopard__10m2003a.dmgiPhone SDK 3.2 Final with Xcode 3.2.2 for Snow Leopard (10.6.0)http://developer.apple.com/ios/download.action?path=/iphone/iphone_sdk_3.2__final/xcode_3.2.2_and_iphone_sdk_3.2_final.dmgXcode 3.2.3 and iPhone SDK 4 GM seed for Snow Leopard (10.6.2)http://developer.apple.com/ios/download.action?path=/iphone/iphone_sdk_4_gm_seed/xcode_3.2.3_and_iphone_sdk_4_gm_seed.dmgXcode 3.2.3 and iPhone SDK 4 Final for Snow Leopard (10.6.2)http://developer.apple.com/ios/download.action?path=/iphone/iphone_sdk_4__final/xcode_3.2.3_and_iphone_sdk_4__final.dmgXcode 3.2.3 and iOS SDK 4.0.1 for Snow Leopard (10.6.4)http://developer.apple.com/ios/download.action?path=/ios/ios_sdk_4.0.1__final/xcode_3.2.3_and_ios_sdk_4.0.1.dmgXcode 3.2.3 and iOS SDK 4.0.2 for Snow Leopard (10.6.4)http://developer.apple.com/ios/download.action?path=/ios/ios_sdk_4.0.2__final/xcode_3.2.3_and_ios_sdk_4.0.2.dmgCredits go to Cédric Luthi for telling us the correct url aboveXcode 3.2.4 and iOS SDK 4.1 for Snow Leopard (10.6.4)http://developer.apple.com/ios/download.action?path=/ios/ios_sdk_4.1__final/xcode_3.2.4_and_ios_sdk_4.1.dmgXcode 3.2.5 and iOS SDK 4.2 GM for Snow Leopard (10.6.4)https://developer.apple.com/ios/download.action?path=/ios/ios_sdk_4.2_gm_seed/xcode_3.2.5_and_ios_sdk_4.2_gm_seed.dmgXcode 3.2.5 and iOS SDK 4.2 for Snow Leopard (10.6.4)http://developer.apple.com/ios/download.action?path=/ios/ios_sdk_4.2__final/xcode_3.2.5_and_ios_sdk_4.2_final.dmg