Virex 7.5.1 can‘t install or update if BSD Subsystem isn‘t installed

If you see one of the following alerts, you may not have the BSD Subsystem of Mac OS X installed:

• If you're running Mac OS X 10.2.6 through Mac OS X 10.2.8, you may see this message when you try to install Virex 7.5.1:

  Virex 7.5 requires Mac OS X v10.2.6 or later.

  
• If you're running Mac OS X 10.3 or later, you may see this alert when you try to run eUpdate:

  An error occurred while installing the update. The eUpdate was not completed.

  

If you see either of these alerts, check to see which version of Mac OS X you are running. To do this, from the Apple menu, choose About This Mac. To install the BSD Subsystem, find instructions for your Mac OS X version below:

If you're running Mac OS X 10.2 through Mac OS X 10.2.5:

• From the Apple menu, choose Software Update, and update your operating system to Mac OS X 10.2.6 or later. Then install the BSD Subsystem by following these instructions.

If you're running Mac OS X 10.2.6 through Mac OS X 10.2.8:

• Install the BSD subsystem. Find instructions on how to do this here.

If you're running Mac OS X 10.3 or later:

• Reinstall Mac OS X 10.3, and make sure that you select BSD Subsystem when you perform the installation. For more information about the BSD Subsystem, click here.