Your Mac was fine yesterday.

Today it takes longer to wake up. Apps hesitate when they launch. Maybe you’re seeing more spinning beachballs than you used to.

The first instinct is usually to blame the last thing that changed:

• “It must have been the macOS update.”
• “Maybe that new app is causing it.”
• “I guess I should reinstall macOS.”

Sometimes that’s exactly what’s happening. But not always. One symptom can have a dozen different causes. Low storage, failing hardware, damaged files, a buggy application, or a recent update can all make a Mac feel slow.

The mistake is picking one before you’ve ruled out the others.

When we’re troubleshooting Macs, we try to answer one question before we do anything else:

Is this a hardware problem, or is it a software problem?

If the hardware checks out, you can spend your time looking at macOS, startup items, browser extensions, or recently installed software. If the hardware doesn’t check out, reinstalling macOS probably isn’t going to solve the problem. That’s why the first step is gathering information—not making changes.

Techtool Pro’s Check Computer was designed for exactly that. Rather than jumping straight into repairs, it runs a suite of hardware diagnostics so you can quickly rule out (or identify) problems before changing anything else.

Once you know the hardware is healthy, your troubleshooting becomes much simpler. Or, if Check Computer identifies an issue, you know where to focus next instead of wasting hours chasing the wrong cause.

The fastest way to solve a problem isn’t to start fixing things. It’s to start eliminating possibilities.