A Mac can slow down even when the app you are working in is doing very little. Browser tabs left open for later and busy background processes still compete for the machine. Mac Ninja puts idle tabs to sleep without closing them and lowers the priority of background CPU and disk activity. Its menu bar dashboard lets you see what changed. The app works on Intel and Apple silicon Macs running macOS 10.15 or later. A seven-day trial needs no card; after that, a license costs $9.99 per year or $24.99 for lifetime use across three Macs.

Mac Ninja

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