iStat Menus
PaidThe long-standing, deeply detailed menu-bar monitor for CPU, memory, disks, fans, batteries and network.
Paid, also on Setapp
Official site
iStat Menus official siteSystem monitors
5 apps.
Stats
FreeA free, open-source menu-bar monitor that covers the same ground as the paid ones, in small widgets you choose.
Free and open source
GitHub
Stats official site
MenuMeters
FreeClassic CPU, memory, disk and network meters in the menu bar, kept alive as an open-source fork.
Free and open source
GitHub
MenuMeters official site
TG Pro
PaidTemperature, fan curves and alerts, aimed at Macs that run hot or sit under load.
Paid, one-time or subscription
Official site
TG Pro official site
Sensei
PaidA hardware dashboard, cleaner and performance panel in one, including temperatures and disk health.
Paid, with a free download to try it
Official site
Sensei official siteSuggest an app
If a small Mac utility is missing, send the name and a link. We only add it after checking the page.
A note when the list grows
Occasional email when we add a batch of apps worth opening. No ads, and we never sell the address.