System Monitor 是一款Mac上优秀的系统监控工具，可以方便的在菜单栏监控显示系统的信息，包括CPU、内存、网速、温度、硬盘等等，很不错！
If desired, System Monitor can also simulate the flickering activity lights of hard drives or network sockets in the menu bar. This is possible either in color or, perfectly integrated into the design of OS X, in inconspicuous black-and-white. PC switchers who miss this feature on Mac computers can easily retrofit this function with System Monitor.
Feature Set
System Monitor lets you monitor your computer the following metrics:
Total system load, separate loading the operating system, user programs and priority programs reduced
Viewing the 5 main processes now place the greatest burden on the system.
Number of processes currently in the system.
Uptime since the last startup
CPU temperature characteristic measured as close to the first processor
Revolution speed of all air blowers controlled by computer
Memory usage of the operating system, separated in quiet, active and inactive memory.
Viewing the 5 main processes that consume larger portions of memory
Number of swap-ins disk storage to main memory
Number of exchanges from main memory to disk storage
Size of swap space currently used
Storage space used on disk volumes currently connected to the system. The volume set to monitor can be customized freely.
Current rates and transfer wide band attached hard drives. The disk set can be customized to monitor freely. The statistics include the amount of data read and write, the number of events read and write, transfer maximum performance to and from a drive and all data accumulated since the last system startup.
Display interfaces currently active and operational network with TCP / IP.
Viewing the public Internet address, even if your computer uses a router to connect to the Internet
Automatic tracking which network interface is currently connected to the Internet.
Current rates and transfer wide band active network interfaces. The set of interfaces can be customized to monitor freely. The statistics include the amount of data sent and received, the number of packages, the maximum transfer performance data and all data accumulated since the last system startup.
Activity reading and writing hard drives and standby HDDs
Send and receive network interfaces activity.
Compatibility: OS X 10.7 or later
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