iStat pro 4.9 for Mac OS X
iStat Pro is the ultimate system monitoring widget, consisting of nine sections which can be shown or hidden.
It features highly detailed information on CPUs (up to 8 cores), memory, hard drives, IP and external IP, bandwidth, battery, wireless keyboard and mouse battery, uptime, temperatures, and fans. You’ll know exactly what’s going on inside your Mac!
Requirements: Mac OS X 10.4 or higher