How to Install OS X Lion from USB

When it comes to installing OS X Lion, there are a few steps that you need to follow carefully to ensure a smooth and successful installation process. In this article, we will guide you through the process of installing OS X Lion from a USB drive.

Step 4: Post-Installation Using MultiBeast

Once you have installed OS X Lion, you can switch back to your AMD 6xxx graphics card. However, we recommend using an alternate graphics card or onboard Intel HD 3000/4000 graphics for the entire process due to an issue with AMD 6xxx cards in Mountain Lion.

Special Instructions for AMD 6xxx Graphics Cards

If you are using an AMD 6xxx graphics card, there is a special instruction that you need to follow. Sometimes, setting the verbose mode can solve many issues and allow you to access the installer screen. To do this, type `verbose` at the boot screen above.

Another option is to set PCIRootUID=1 manually by typing this command at the boot screen. This setting may be necessary on motherboards using Fermi and Kepler NVIDIA cards for installation.

Troubleshooting Tips

If you encounter any issues during the installation process, such as a black screen or flickering screen, you will need to troubleshoot them yourself based on your own hardware specs. Here are a few things that you can try:

* Hit the arrow-down key on the boot screen to access boot options.

* Type extra boot arguments in the system at the boot screen above.

Optional Boot Arguments and Troubleshooting Tips

For maximum compatibility, we recommend using integrated graphics (HD 3000/4000) for the installation, then adding your discrete graphics card after a successful installation. If you encounter any issues during the installation process, you can try one of the following flags:

* DVI

* HDMI

Alternatively, you can try switching to a different port or trying a different graphics port.

Installing OS X Lion from a USB drive can be a complex process, but by following these steps and troubleshooting tips, you should be able to successfully install the operating system. Remember to use an alternate graphics card or onboard Intel HD 3000/4000 graphics for the entire process if you are using an AMD 6xxx graphics card.

Install os x lion from usb