Close unresponsive apps and processes

When your system is acting sluggish or simply not responding, an app or process may be the source of the problem. You can use Activity Monitor to locate the troublesome app or process and force it to quit.

Memory test software, often called RAM test software, are programs that perform detailed tests of your computer's memory system. The memory installed in your computer is very sensitive. It's always a good idea to perform a memory test on newly purchased RAM to test for errors. There’s nothing faster than launching a Speedtest straight from your Mac toolbar. Download the free Speedtest macOS app today for the quickest way to check your connectivity. Get a real-time check of your ISP’s performance and detect trends over time with data on.

See how much energy your Mac is using

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You can find out how much energy your Mac is using, and see which apps or processes are using the most energy.

See real-time CPU, network, or disk status in the Dock

It’s easy to keep an eye on your system status without even looking at the Activity Monitor window—you can monitor your CPU, network, or disk usage as a live graph right in the Dock.

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To explore the Activity Monitor User Guide, click Table of Contents at the top of the page, or enter a word or phrase in the search field.