Wi-Fi Drops on MacBook: Diagnosing the Real Cause
Wi-Fi gremlins are a top reason people call me. Nine times out of ten it's not the MacBook.
Hold Option and click the Wi-Fi icon in the menu bar. You'll see RSSI, noise, channel, and transmission rate. RSSI worse than -70 dBm means weak signal — move closer or add a mesh node.
Open Wireless Diagnostics from that same Option-click menu. Let it monitor for an hour while you work. When the connection drops, it'll log the event with a timestamp and reason. That log is gold for diagnosis.
Common real causes: a router that needs a firmware update, channel congestion in dense neighborhoods, a saturated 2.4 GHz band overlapping with neighbors, or a router placed inside a media cabinet behind metal doors.
If you want someone to actually solve this rather than chase symptoms, I do home Wi-Fi diagnosis as part of a regular service call. A spectrum reading and a 30-minute walk-through usually identifies the cause permanently.
Need a hand?
Local, on-site Apple help in the foothills.
If reading this guide didn't fully solve it, I come to you. Grass Valley, Nevada City, and surrounding areas.