Mac Ninja

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Unload idle browser tabs and prioritize the Mac app in front

Mac Ninja runs in the menu bar on Intel and Apple silicon Macs running macOS 10.15 or later. It unloads idle browser tabs while keeping them in the tab strip, so you can click one to load it again. Foreground Boost lowers the priority of busy background apps when they compete with the app you are using. The optional Mac Ninja Helper for Chrome can also close abandoned tabs that a browser agent created in its own group. Mac Ninja comes with a seven-day trial. A license covers up to three Macs and costs $9.99 a year or $24.99 once.

Problem it solves

Long browser sessions leave many idle tabs using memory, while background apps can compete for processor and disk time. Mac Ninja helps users keep those tabs available while reducing that pressure.

How it's different

It combines idle-tab unloading with foreground app prioritization in one Mac menu bar utility. The optional Chrome helper can distinguish and close abandoned tabs a browser agent opened in its own group.