this team has some really amazing support! to help me stay in the platform using my ancient (2007) MacBook - they shared this workaround so no more than 2 people can come into my view:
let oldPMSubscribe = pm.subscribe.bind(pm)
pm.subscribe = (id) => {
if (Object.keys(pm.subscribed).length > 2) return;
oldPMSubscribe(id)
}