This "patch" is a new version of the application for Rebel Assault Macintosh. It fixes a problem that occurs on certain configurations (in particular Power Macintoshes) that caused a "Bad frame header id" error message to occur. For people using Power Macintoshes or Macintoshes with a PowerPC™-equipped accelerator card, version 1.06p (located in the "Power Mac" folder) is the native mode version, offering vastly increased performance.
You may run the new version(s) either from the floppy disk or off of your hard drive. When you double click on the Rebel Assault icon, the application will read the files off of your Rebel Assault CD-ROM (be sure to have it ready in the CD-ROM drive) and the game will begin.