I'm on OS 10.6.8 on a macbook air and trying to install the xcode 3.2.6 that i downloaded from apple. I have plenty of free disk space. When I run the installer I get the message: The Installation Failed. An unknown installation error has occured. I've tried installing from a new admin user. I'm not sure where to look or how to solve this problem. Any ideas?
MacBook Air, Mac OS X (10.6.8), 1.4 GHz Intel Core 2 Duo / 2 GB
It worked for me,
https://discussions.apple.com/thread/3833370?answerId=17977393022#17977393022
All i did [as per above link] was to change the sys date to Mar 1 2012 and do a reinstall of Xcode 3.2.6.
This solved it for me. Take a look at the expired certificates.
This solved my question.
Resetting the clock also works to re-install XCode 4.2 on Snow Leopard.
I did an OS reinstall after a drive reformat and XCode wouldn't install from the Disk image I'd used earlier.
"Unknown installation error".
Reset the clock from 2013 back to 2012 and it installed no issues.
Might be good if Apple could re-package the installer with an updated certificate...
updating the software installer allowed me to install the xcode package! thanks!
I noticed the error was coming from an expired certificate on only the iOS portion of the install. If you don't care about that (I was only interesting in building universal binaries that can run on both PPC and Intel Macs), you can try declining the second licence agreement covering iOS. Then the installer will proceed with only Mac-related files which, for me at least, was ideal.
xcode 3.2.6 installation failed?
