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How to edit com.apple.Boot.plist in Installer?


AaronR
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I tried to set the resolution of login window by adding Graphics Mode to com.apple.Boot.plist. After reboot all I got is a blank screen. Is there any way to undo the change I made? There is no editor available in installer terminal.

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When booting, before you get to the grey screen, and also before you get to the "Loading Darwin/X86" text, bash F8. Then type in:

 

"Graphics Mode"="1024x768"

 

(with the quotes). Be sure to edit the boot.plist file back to how it was to avoid having to do this on startup every time.

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Thanks. F8 worked however system still crashed with 1024x768. So I booted with -s, typed sudo -s (strangely it didn't ask for password) then nano to edit the file. When I ctrl O to save it says file is 'read only'? How to change the file permission so I can write to it?

 

OK I figured it out. The hint is actually just a few lines above the prompt after boot -s. The system is mounted read only. To change it, type:

 

/sbin/fsck -fy

/sbin/mount -uw /

 

After these steps I can change the boot.plist file.

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