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set everyone to no access on the system SSD

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Jan 3, 2012
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Motherboard
GA-Z77X-UD5H [rev 1.0]
CPU
Intel Core i7 3770 3.4GHz Socket 1155 8MB Cache
Graphics
Gigabyte GTX 560Ti OC 1GB GDDR5 Dual DVI Mini HDMI Out PCI-E
Mac
  1. 0
Classic Mac
  1. 0
Mobile Phone
  1. 0
Well the title says it all really, I was messing around with the permissions in a 100% functional 10.8 and before I looked into the Posix permissions properly I set 'everyone' to no 'access' on the system SSD.

Understanding File and Folder Permissions (POSIX) on Linux and Mac OS X (using chmod) is what I should have read first :eek: (the ordering confused me as to what user and everyone meant)

On booting I get a white screen with a working cursor. The -x gives the same result. -v shows the attached images.

Have I totally borked it beyond repair?

There are a few files I'd like to get back if possible.
 

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To answer my own question in case someone else stupidly does this, all I needed to do was unplug my main hard drive and use a HDD>USB adapter on my friends mac. Then it simply showed up as an external hard drive, and I could change the user right back to how they were before. All sorted.
 
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