System 7.1P4 was never released installed on a specific Performa system or as a stand-alone System install. Apple moved directly from System 7.1P3 to System 7.1P5. However, in 1993, Apple did release a Performa Utilities Restore Disk with this version. The contents of this disk look very similar to the system software contained in 7.1P5 and 7.1P6. Changes from 7.1P3 are undocumented and unknown.