Is your Mac short of memory? Check before replacing it

Switching from a video call to a document should not interrupt your train of thought. If it keeps doing so on your M1 or M2 Mac, start by opening Activity Monitor → Memory while the slowdown is happening. The useful question is whether your everyday workload is putting memory under pressure, and what changes when you remove something you do not need.

Watch your actual workload

Having very little unused RAM is not, by itself, a reason to replace a Mac. Apple explains that macOS aims to use memory efficiently; leaving more of it unused does not necessarily improve performance.

Look at Memory Pressure, the graph at the bottom of the Memory pane. Apple describes green as efficient RAM use, yellow as a possible future need for more, and red as a need for more RAM. Pair that signal with the task that feels slow. A momentary colour change cannot choose your next computer for you. Apple’s guide to assessing RAM needs

For this observation, keep your normal combination of apps open: perhaps a call, a document and the browser you use for research. Checking an almost-empty desktop immediately after restarting answers a different question from checking the workload that keeps interrupting you.

Treat swap as context

The pane also shows Physical Memory, Compressed, Cached Files and Swap Used. Physical Memory is your installed RAM. Compression makes room in RAM; cached files can help when you reopen an app. Swap Used reports space on the startup disk used to exchange data with RAM. What the memory figures mean

Record swap if it helps you compare sessions, but avoid a rule such as “this many gigabytes means buy a new Mac.” The method here gives more weight to Memory Pressure and the interruption you can actually notice. It does not set a universal swap limit. Nor does freeing disk storage add physical RAM.

Quit one unnecessary app, then repeat the slow action

Save your work first. Leave the apps needed for the task running and choose one you are not using. Quit it from its application menu or with Command–Q. Merely closing its window can leave the app running. Apple’s quit-app guide, in Japanese

Now repeat the same action, such as switching back to the same document. Use three short notes rather than relying on how the computer feels later:

This is a suggested observation method, not an Apple diagnostic test. Quitting an app can change CPU use and other activity too, so an improvement does not prove that memory was the only cause.

Avoid force-quitting unfamiliar processes to make the numbers look better. Apple warns that Force Quit may discard unsaved work or affect other apps that depend on that process. Ordinary quitting is the safer starting point for this comparison. Quit versus Force Quit

Green pressure and a slow Mac need another question

If Memory Pressure remains green while the frustrating delay persists, the case for buying more RAM is still weak. Apple also lists limited free startup-disk space and an app’s system requirements among things to check when a Mac runs slowly. Apple’s slow-Mac guidance

For a delay during a video export, for example, inspect CPU activity next; computation-heavy work can use more processor capacity. Viewing CPU activity. If the problem is confined to copying files to an external SSD, follow the connection-comparison guide. These are different lines of investigation, not diagnoses based on a colour alone.

Use the pattern to frame a purchase

If quitting an unused app lets you work comfortably, continuing with that arrangement may be enough. If the apps you genuinely need together repeatedly coincide with yellow or red pressure and disruptive waits, a configuration with more memory becomes worth considering.

Before seeking advice, record the Mac model, installed memory, macOS version, app names and versions, and those three observations. That gives someone a workload to assess rather than just “my M1 feels old.” Check upgradeability for the exact model; do not assume memory can be added later. Apple’s upgradeability check

Your first useful result is small: one repeatable slowdown and a before-and-after comparison. You can collect that before choosing a chip generation or a memory capacity.

Sources checked 10 October 2026. This edition uses Apple’s macOS 27 documentation. No Mac, app workload or performance improvement was tested for this article. The notes and original diagram describe an observation method, not measured results.