xcpretty
Don't output 'Please authenticate to install simulator' is sudo was authenticated earlier.
If sudo was authenticated before, then password prompt won't appear and installation will proceed. In this case, you see a line telling you to authenticate and an empty line with blinking cursor. The later may be confused for the insecure password prompt.
It is possible to check if sudo requires a password by executing dummy command with sudo -n. This is racy, and there is a chance that password will be requested without printing the line in question. But IMHO, overall user experience should be better with this check.
Ah, I think this is what I've been seeing. Quite confusing. Usually occurs when I'm installing many sims sequentially (and manually).
So after the Please authenticate to install iOS 8.1 Simulator... we just need to wait until there is a Successfully installed iOS 8.4 Simulator ?
Was searching for a solution for this, and turns out patience is the key. Very confusing behaviour
