colima allows to chose between qemu and apple virtualization framework.
I found there is not much diffence in performance between both on my intel macbook.
I think it will not take long until rancher also updates to latest lima to support apple virtualization. but I haven't checked the latest release notes.
That's because QEMU can do hardware acceleration in an x86 host but not in M architecture. But as far as I know, only the Apple framework can do hardware acceleration or use Rosetta 2 to make things near native speed on an M-series Mac.
I found there is not much diffence in performance between both on my intel macbook.
I think it will not take long until rancher also updates to latest lima to support apple virtualization. but I haven't checked the latest release notes.