Failed to install: xcode_4.2_and_ios_5_sdk_for_snow_leopard on OSX 10.6.8

Question

I need to compile some apps with the iOS 5 SDK so I discovered I need to upgrade from xcode 3 to xcode 4.

My mac is on OSX 10.6.8, and I downloaded xcode_4.2_and_ios_5_sdk_for_snow_leopard.dmg from my iOS developer account. The image opens fine, does a check to confirm it can be installed, etc. but when I try the install, I get

"the installation failed. an unknown installation error occurred"

How can I fix this problem? Is there a log file to check?

Answer 1

Although this sounds ridiculous, set your computer clock to 1/1/2012 and it will install.

I had exactly the same issue. There is some date / time issue with Xcode's installer.

Answer 2

Found a proper solution at https://superuser.com/questions/410573/cant-install-xcode-on-os-x-snow-leopard :

Install this: Apple Software Installer Update 1.0.

About Apple Software Installer Update 1.0: "This update addresses an issue that may prevent certain Apple software from installing. This update is recommended for all users running Mac OS X 10.6.8."

Answer 3

我不确定你是否可以在OSX 10.6上安装xcode 4：/我之前已经面对这个问题，他们说你必须升级到OSX 10.7才能安装xcode 4