Background option does not work under MacOS Monterey
**Describe the bug**
The "-B" and "--background" options do not work under MacOS Monterey 12.3.1 (it did not work on Big Sur either).

**To Reproduce**
On MacOS 12.3.1, run the following command (xmrig v6.17.0):
`sudo ./xmrig -o pool.supportxmr.com:443 -u MyWalletString -k --tls --background -p MyMachine`

**Expected behavior**
The command compleates but is not running in the background - no xmrig process in Activity Monitor nor htop command, no cpu spike etc.

**Additional context**
As a workaround, I've been using tmux to run it in the background:
`sudo /usr/local/bin/tmux new -s xmrigsession -d 'caffeinate ./xmrig -o pool.supportxmr.com:443 -u MyWalletString -k --tls -p MyMachine'`
