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An explanation of Mac memory: wired, active, inactive, and free

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When you open Activity Monitor you can see a graph of how much memory your computer is using. But why are there 4 types of memory, represented by various colors on the graph?


Alex has an explanation of what all these types of memory mean — wired, active, inactive, and free — and also how memory usage affects system performance. To summarize, wired memory is used by the system; active memory is used by currently running applications; inactive memory was used by recently closed applications, which allows them to reopen quickly, and free memory is unused. For a better explanation see Alex’s Is my Mac using too much memory?

2 Responses to “An explanation of Mac memory: wired, active, inactive, and free”

  1. Apple Krazy » Blog Archive » Explore your Utilities Says:

    [...] – Activity Monitor let’s you know what is going on with your computer. It can let you know where your memory and CPU is being used [...]

  2. . - Says:

    [...] [...]

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