Mac Ninja

Mac Ninja is a native macOS menu bar utility for Mac users who keep many browser tabs and work apps open. It puts idle tabs to sleep while keeping their place and can lower CPU priority for applications competing with the one in front. A local dashboard shows recent activity and resource readings. A seven-day trial requires no card. A license costs US$9.99 a year or US$24.99 once and covers up to three Intel or Apple silicon Macs running macOS 10.15 or later.