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We are new users of the Casper Suite here and have begun testing Yosemite upgrades and have run into some serious issues.




  • Our test machines are iMacs running 10.9.5.

  • We are able to deploy the Yosemite upgrade package via Casper Admin without any issues.

  • The upgrade completely successfully and our users are able to log back in and use the machines normally

  • However, at some point, usually within 24-48 hours of the upgrade, the machines completely hang up during use to the point where they need to be hard rebooted, during reboot they hang at the Apple Logo and never finish booting

  • booting to Single-User Mode and running Disk Repair returns no errors

  • in some cases we are not even able to boot to Safe Mode



Has anyone run into these sort of issues?

There is a script thought up by some clever cookie that can be created using nano from single user mode that solves the boot issue. (Command + S during boot)



https://jamfnation.jamfsoftware.com/discussion.html?id=12589#responseChild76389

This is unfortunately a well known issue both in JAMF and elsewhere, with over 300 posts on this JAMF Nation thread. Are these computers bound to Active Directory? Can you avoid upgrading to Yosemite yet?

@pevans other than the superb suggestions above.



It's also been suggested that 10.10.3 beta resolves the "loginlockout" issue.



If you're testing 10.10.3, it might be worth testing the beta.

The solution from https://jamfnation.jamfsoftware.com/discussion.html?id=12589 worked for me.



Simply put, created a file called rc.server in the /etc directory that contains the following script:



#!/bin/sh



# Solves Yosemite Macs stuck at 50% boot (Progress Bar)



/bin/echo BootCacheKludge Beta 1.0 - Chris Hotte 2015 - No rights/blame reserved.

/usr/sbin/BootCacheControl jettison


Reboot

Thanks for the quick responses. The tip for creating the rc.server file worked for me.

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