Using macos 12 as required for MPS feature in nightlies (#77263)
Using macos 12 as required for MPS feature in nightlies
This is first step to address following issue: https://github.com/pytorch/pytorch/issues/77210
Pull Request resolved: https://github.com/pytorch/pytorch/pull/77263
Approved by: https://github.com/malfet, https://github.com/seemethere, https://github.com/albanD
