I created a liveUSB to use with my 21.5-inch, Mid 2010 iMac i3 ATI Radeon HD 5670 512 MB.
Every time I boot from the usb stick I get the "The system is running in low-graphics mode" I tried the following but nothing works...
sudo apt-get install fglrx
- installed the ATI propritary drivers
Let me know what kind of log files you wish to see in order to help me troubleshooting this one.