Prepare the computer
Update the operating system and browser, then close unrelated tabs and applications.
Update macOS, choose a trusted desktop app or browser route and verify audio, display and network settings.

The route below is intentionally service-neutral and uses no third-party screenshots.
Update the operating system and browser, then close unrelated tabs and applications.
Use a wired connection where practical or move closer to the Wi-Fi access point.
Use the supported application or a current browser profile without conflicting extensions.
Enter account details only on the expected local or secure website flow.
Check full-screen, audio output, display scaling and sign-out before saving shortcuts.

Restart the relevant app first, then the device, then the router. Record the result after each step so support can see what changed.
Model-specific behaviour can vary, but the preparation and privacy principles remain consistent.
Return to the full guide library, read the broadband speed guide or use the buffering checklist.