Changed permissions for "Macintosh HD"

[imagineerthat]

For some reason or another, I right clicked on my Macintosh HD icon, chose get info, then changed permission to read & write, and applied it to all enclosed items. Then I restarted my MacBook and it wouldn't boot. It would just hang on the Apple logo boot screen with the spinning thing.

So I did some research online and saw that I would have to wipe my whole hard drive and start over since I applied read & write to all enclosed items. I put the OSX disk in, and booted to it. Before I went to install a fresh copy of OSX, I tried to repair disk permissions instead. To my delight, it worked. I was able to boot like normal.

But now I am having some strange problems.
-When I turn on Macbook a window pops up that says "error system extension cannot be used" and then it says below it:
The system extension "/System/Library/Extensions/BJUSBLoad.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update.

-Laptop reboots by itself after screensaver comes on, when I try to log in and load Firefox, the bouncing icon will be all jumpy, firefox never loads.

I tried running repair disk permissions and it keeps saying "permissions differ on "system/library/frameworks/" then a bunch of codes

It also says "Warning: SUID file "system/library/coreservices/... has been modified and will not be repaired."

I have a Macbook Pro with Snow Leopard
I have no idea what to do. Help

 

[jenzjen]

You answered it in your 2nd paragraph, just do a wipe and clean install.

 

[yusukeaoki]

yeah thats what you basically have to do. Clean you Hard drive out

 

[42streetsdown]

it'll be next to impossible to figure out what's wrong. Do a clean install, it'll save you the hassle.

 

[old-wiz]

Sometimes I wish that the OS was a little smarter in allowing people to monkey around with permissions. The *NIX permission scheme is quite contorted and when I was working it was not surprising to see new employees with Comp Sci degrees run amuck changing permissions without knowing what they were doing and resulting in a godawful mess. I have changed permissions on OSx, but I'm very careful to only do it down from the user home directory level.

Your only real recourse now is to do a clean install.

 

[marc11]

The OS shouldn't replace common sense. Apple, as much as they try cannot protect everyone from everything, sometimes you need to ask yourself "is this a good idea and do I know what will happen"...

 

[imagineerthat]

What if I just right click on "Macintosh HD" > get info > and change the "privilege" back to read only, as before? BTW: This is not the main account on the macbook, it has administrator privileges but it wouldn't let me update some applications, that's why I tried to change the permissions, because it was beginning to get annoying.

 

[jenzjen]

What if I just right click on "Macintosh HD" > get info > and change the "privilege" back to read only, as before? BTW: This is not the main account on the macbook, it has administrator privileges but it wouldn't let me update some applications, that's why I tried to change the permissions, because it was beginning to get annoying.

Why don't you try it out and report back?