When was the last time Apple used an Arm chips over intel ? According to the Wiki, this was 2005. X86 software and GPUs were behind apple by quite a way back then. Did they still add Arm to later versions?
Originally X86 was not built with graphics processing in mind. It did not really show anything worth while until the Nvidia viper GPUs in the mid 90s. Prior to that Amiga had the best for graphics processing. I seem to remember Lightshow being the software for Amiga (don’t quote me on that, it is from memory). PC became the best for gaming when Voodoo release their first card (possibly 97/98), but they still could not compete with an Apple in graphic processing. Amiga had fell away by this time.