If you have rosetta2 enabled, this seems to work -- except that the host & target platforms for the build are then detected as x86_64. If you are trying to produce arm64 builds, this is pretty confusing 😂

This is the bazelisk output

2021/08/08 16:57:45 Using unreleased version at commit d4dd2038039ecbc63e2d3037855c31145b335ad4
2021/08/08 16:57:45 Downloading https://storage.googleapis.com/bazel-builds/artifacts/macos/d4dd2038039ecbc63e2d3037855c31145b335ad4/bazel...
Extracting Bazel installation...
Starting local Bazel server and connecting to it...

I'm not sure if arm64 macos builds are available at the https://storage.googleapis.com location, but it seems to me that the URL is missing an x86_64 vs arm64 component to pull the right version.