iStat Menus 5.30 (702) – Monitor your system right from the menubar. 

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iStat Menus lets you monitor your system right from the menubar. Included are 8 menu extras that let you monitor every aspect of your system.
Some features:

CPU — Monitor cpu usage. 7 display modes, multiple core support.
Memory — Monitor memory usage. 4 display modes, page ins/outs and swap usage display.
Disks — Monitor disk usage and activity. 6 display modes, ability to hide disks you dont want to see.
Network — Monitor current and total bandwidth, peak bandwidth, IP addresses, and the ability to hide network connections you don’t want to see.
Temps — Monitor the temperature of your Mac. 2 display modes, ability to hide sensors you don’t want to see.
Fans — Monitor the fan speeds in your Mac. 2 display modes, ability to hide sensors you don’t want to see.
Bluetooth — Control bluetooth status plus monitor the battery level of your Apple wireless keyboard or mouse.
Date & Time — Date and time in your menubar. World clock display lets you see the time in multiple locations around the world.

WHAT’S NEW

Version 5.30 (702):
Added

preliminary support for late 2016 MacBook Pros

Improved

support for macOS 10.12.
Improved bluetooth battery monitoring

Fixed

missing network processes in macOS 10.12.
menubar order not being remembered in macOS 10.12 after rebooting.
an issue where iStat Menus may have required the discrete GPU to be used.
an issue with requesting calendar event access.
an issue where there may have been extra logging appearing in Console if the Disks extra was enabled in macOS 10.12.

REQUIREMENTS

OS X 10.8 or later, 64-bit processor