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Fix slow Wi-Fi on your Mac

Before you blame the router or the ISP, rule out the Mac side of the connection in ten minutes.

DifficultyEasy
Time10 min
RiskLow
ReversibleYes
PlatformmacOS
UpdatedAug 18, 2026

Written and tested by emdottech

What that means

Low risk. This fix only checks things, or changes settings you can switch back in the same place. This change is reversible — you can return to the previous state without professional help or data loss.

Four Mac Wi-Fi fixes in order — forgetting and reconnecting to the network fresh, preferring 5 GHz when offered, rebooting a memory-clogged router, and a wired test to isolate placement or interference

Steps

01
- Toggle Wi-Fi off and back on (menu barControl Center), then click the Wi-Fi icon → Details → 'Forget This Network' and reconnect with the password — this clears a stale handshake
02
- Check you're on 5 GHz if your router offers it (often named like 'Home-5G') — faster, less congested, shorter range
03
- Reboot the router: months of uptime clog its memory; if speed returns for a week and then sags again, schedule a weekly reboot
04
- Test wired vs Wi-Fi with an Ethernet adapter or USB-C hub — if wired is fast and Wi-Fi isn't, it's placement or interference, not your line

How to verify the fix

Wi-Fi speed matches your wired test (or the gap is explained by placement), and the connection stays stable on 5 GHz if available.

If this didn't fix it

Wired is fast but Wi-Fi still slow after forgetting/reconnecting — it's placement or interference; move closer or switch bands.

Next stop: the related fixes below, or start a guided diagnosis.

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Fix slow Wi-Fi on your Mac

Steps

✓How to verify the fix

!If this didn't fix it

Related fixes

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