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After OSX Update -> Yosemite: No option to login and run the system.

Via Firewire (T) and Diskutils && Diskwarrior: "Unvalid Disk-Label @ 499239710720: cksum mismatch"

Diskwarrior: no option to rebuild Diskutills: Unvalid Disk-Label @ 499239710720: cksum mismatch

What could I do to reboot and rerun the machine? How to fix this problem?

  • Recovery - Cmd/R at the chimes – Tetsujin Oct 18 '14 at 12:29
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You might have invalid Yosemite Installer package.

Try the Command+Option+R during boot to recover it from Internet.

To check the flie run following in the Terminal

shasum /Applications/Install\ OS\ X\ Yosemite.app/Contents/SharedSupport/InstallESD.dmg

The result should be:

eebf02a20ac27665a966957eec6f5e6fe3228a19  /Applications/Install OS X Yosemite.app/Contents/SharedSupport/InstallESD.dmg

Do this before running the Install.

  • thx. the solution was a reinstall of yosemite -> it works. – Teletubbi-OS X Oct 19 '14 at 11:33
  • -bash: shasum: command not found – user123609 Apr 26 '15 at 21:31
  • @LarryJohn is your PATH not set correctly? Try /usr/bin/shasum /Applications/Install\ OS\ X\ Yosemite.app/Contents/SharedSupport/InstallESD.dmg instead. Sounds like you have an issue with your PATH environment variable. – Ian C. Apr 26 '15 at 22:16

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