Change the documentation in the CMakeLists.txt file to reflect that the available Mac OS SDKs depend on the version of XCode installed as well as the version of Mac OS X
Change the documentation in the CMakeLists.txt file to reflect that the available Mac OS SDKs depend on the version of XCode installed as well as the version of Mac OS X

XCode 4 only ships with the 10.6 and 10.7 SDKs, so building for 10.5 requires
XCode 3.2.6, which fortunately is still available from Apple's website.

zhengw1985/Update-Installer,zhengw1985/Update-Installer,zhengw1985/Update-Installer