What Is the pmTool on an iMac?
The pmTool on an iMac is a program used by the operating system's Activity Monitor. The program's primary function is to collect information on all the programs and processes running on the computer.
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Activity Monitor
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The Activity Monitor is a program in Mac OS X that lets you visually examine what is going on behind the scenes on the computer. It tracks things like memory usage and processor usage. It is commonly used to determine how much of the computer's resources a particular application is using.
Contributions To Activity Monitor
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The pmTool is one of the programs that works with Activity Monitor to track what applications on the computer are doing. The Activity Monitor displays the information, but the pmTool gathers the information.
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Background Process
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You will probably not realize pmTool even exists unless you look in the Activity Monitor. Some users may notice that pmTool is using a lot of resources and may try to close it, only to have it reopen immediately because it is a background process. It is not something you should worry about unless it is causing the iMac to experience excessive slowdown.
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References
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