Hi guys new to this forum here, had to sign up to seek help. All of a sudden out of nowhere System Preferences would bounce once and then not open. I tried App Store as well, same thing. Disk Utility? Same thing. Terminal? Same thing. I have tried almost everything I've seen in these forums ie. Plist removal, boot disk mode to run disk utility and run a first aid, safe mode. Alas, to no avail. Nothing will work. Any help would be greatly appreciated.