For Apple to develop an ISA they would have to develop a CPU. Something they don&#x27;t do inhouse.<p>Up until now the CPUs have been designed by ARM. Cores like Swift for example were not developed at Apple, but rather at ARM.<p>The likelihood of ARM releasing a chip into the wild with a non-ARM ISA is not all that great, since the ARM ISA is what ARM makes all of its living from.<p>Until the day where Apple is capable of creating a CPU by themselves there will be no Apple ISA.