The trouble with sandbox-exec is that it’s control over network access is not fine grain enough, and I found its file system controls insufficient.
Also, I recently had some bad experiences which lead me to believe the tool MUST be run with strict CPU and memory resource limits, which is tricky on macOS.
It looks like linux vms, which apple's container-cli (among others) covers at a basic level.
I'd like apple to start providing macOS images that weren't the whole OS.. unless sandbox-exec/libsandbox have affordance for something close enough?
You can basically ask claude/chatgpt to write its jail (dockerfile) and then run that via `container` without installing anything on macos outside the container it builds (IIRC). Even the container-cli will use a container to build your container..