jq is already installed now in either a newer version of CircleCI's MacOS VMs or in a previous CI step.
I ran a failing macos job with ssh enabled, and inspected '/usr/local/bin' and found found the following output
lrwxr-xr-x 1 distiller admin 23 Jun 22 14:50 jq -> ../Cellar/jq/1.6/bin/jq
the existing symlink causes the 'Install jq' job to fail.
removing this job should resolve the issue
