System 7.1P6 was released in February 1994 for the Performa 575, which initiated a temporary "Performa system software" era. Despite the differences (and the apparant dual-track system), "normal" Macs were perfectly able to run Performa system software, and vice-versa, although Apple refused to deal with any users that installed or ran the wrong system software. The performa system softwares used a progess bar during startup. For colour Performas, colour support was fully maximised by making the default setting 256 colours instead of black-and-white.