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MacMonitor is a free, open-source system monitor built specifically for Apple Silicon (M1–M4). It lives in your menu bar, updates every 2 seconds, and opens a full dark-mode dashboard showing CPU per-core usage, GPU, memory, battery
health, power rails, network, disk I/O, and your top processes — all from the metal, no subscriptions. Install in one command: brew tap ryyansafar/macmonitor && brew install --cask macmonitor
MacMonitorReal-time Apple Silicon system monitor for your menu bar
Ryyan Safarleft a comment
My Mac was running hot and I had no idea why. I went down the rabbit hole — tried a bunch of open source tools on GitHub, some terminal commands that half-worked, deep cleaning scripts that did something but I could never tell what. Eventually I caved and tried iStatMenus. It was great, but I didn't want to pay a subscription just to know what my own computer is doing. What I actually wanted...
MacMonitorReal-time Apple Silicon system monitor for your menu bar