When a Mac won’t stay connected to Wi-Fi, run Wireless Diagnostics, forget and rejoin the network, and check router settings.
Your Mac drops off Wi-Fi, pages stall, and the signal icon flips between full bars and a slash. This guide gives clear fixes. Start with quick checks, then move into deeper steps.
Fast Clues And Quick Fixes
| Symptom | Likely Cause | Fast Fix |
|---|---|---|
| Disconnects after wake | Power settings or router sleep timers | Toggle Wi-Fi off/on, then restart Mac and router |
| Random drops every hour or so | DHCP lease churn or crowded channel | Renew lease, change router channel |
| Only your Mac has the issue | Saved network entry or driver bug | Forget network, update macOS |
| Works on phone, not on Mac | Keychain mismatch or firewall tool | Delete network, disable VPN/security app |
| Near the router is fine; far is bad | Interference, weak band choice | Use 5 GHz near, 2.4 GHz farther, move metal objects |
Mac Not Staying Connected To Wi-Fi: Proven Steps
Work through these steps in order. Stop when a full stream or large download runs without a drop.
Confirm The Basics
Restart the Mac and the router. Check the modem light. In the Wi-Fi menu, confirm strong RSSI and a steady transmit rate. If other devices struggle, suspect the router or the line.
Forget And Rejoin The Network
Open System Settings › Wi-Fi › Details for your network, choose Forget This Network, then add it again and re-enter the password. This clears bad profiles, old security modes, and stale IP data that can push a Mac off the air.
Update macOS And Router Firmware
Install the current macOS build through Software Update. Many Wi-Fi fixes ship in point releases. Update the router’s firmware from its admin page, since roaming and security modes change over time.
Run Wireless Diagnostics
Hold Option and click the Wi-Fi icon, then open Wireless Diagnostics. Let it monitor during a drop. Read the Summary items and follow the prompts. Apple’s guide on Wireless Diagnostics shows each panel and where to change settings.
Pick Clean Channels And Sensible Band Width
Use 5 GHz for speed and 2.4 GHz for reach. Set 20/40 MHz on 2.4 and 80 MHz on 5. Skip 160 MHz in dense areas. Pick a non-overlapping channel and avoid Auto if it keeps hopping.
Renew DHCP Lease And Test DNS
In Wi-Fi Details, click Renew Lease to get a fresh address. If sites fail to load while the Wi-Fi icon stays solid, try known public DNS servers or your ISP’s default. Flush caches with a reboot and test again. Note any error codes and the time of each drop for patterns. Share that log with your provider if outages persist.
Turn Off VPN, Proxies, And Security Apps
VPN clients, traffic filters, and ad blockers can interrupt handoffs between bands or access points. Quit them, then test on plain Wi-Fi. If the link holds, re-enable tools one by one to find the culprit.
Remove Old Preferred Networks
Open the list of Known Networks and delete stale entries that share a name with your current SSID. A Mac can jump to a weak clone if the list is cluttered. Keep your home SSID and any trusted hotspots, and purge the rest.
Create A New Network Location
In Network settings, add a fresh Location, then rejoin Wi-Fi. Locations keep their own caches, routes, and DNS. A clean slate often clears odd loops where the Mac clings to a dead gateway.
Check Power Settings
On laptops, set Prevent automatic sleeping on power adapter when the display is off if you need long downloads. Turn Wake for network access on for stable file sharing. Small tweaks here stop dropouts tied to sleep transitions.
Router Features That Trip Macs
Smart Connect band steering, aggressive roaming, and strict WPA3-only modes can break older clients or mixed homes. Use WPA2/WPA3 transitional if needed. Disable client isolation on home networks. Match country code and channel rules to your region.
Test On Another Network
Hotspot from a phone or visit a trusted Wi-Fi. If the Mac stays online there, the issue lives with your router or line. If it drops everywhere, the Mac’s setup is at fault and you’ll keep working from the steps below.
Use Apple’s Built-In Tools The Right Way
macOS ships with checklists and logs that speed up this job. Two Apple pages are especially handy during mid-stack checks: the Wireless Diagnostics walkthrough and the router settings reference. Use them to confirm that your setup matches the guidance.
Wireless Diagnostics Tips
Run a scan at peak time and again late at night. Save the report. Watch channel use, PHY rate swings, and retries. If it flags interference, raise the router and move it away from appliances and mirrors.
Apple’s Recommended Router Settings
Set security to WPA2/WPA3 Personal, pick AES, and keep legacy WEP off. Apple lists these in its router settings. Use DHCP unless you need static entries. Keep SSIDs simple, avoid hidden networks, and skip odd characters.
When Drops Happen Only At Work Or School
Managed networks can enforce captive portals, device profiles, and traffic shaping. Ask the admin if MAC address randomization is allowed for that SSID. If not, turn off private Wi-Fi address for that one network. Avoid personal VPN on those links unless the policy allows it.
Advanced Fixes For Persistent Drops
If your Mac still falls off Wi-Fi after the basics, move to the checks below. These target edge cases that show up with mixed gear, older routers, or long-running laptops.
| Setting | Where To Change It | What To Try |
|---|---|---|
| WPA mode | Router admin | Use WPA2/WPA3 transitional |
| Band steering | Router admin | Split SSIDs into 2.4 and 5 GHz |
| Channel width | Router admin | 2.4 GHz at 20/40; 5 GHz at 80 |
| DNS servers | Network › Wi-Fi › DNS | Try ISP default or a well-known public set |
| Roaming aggressiveness | Router admin | Lower the push to roam between APs |
| Country/region | Router admin | Match your location to avoid illegal channels |
| Known networks list | Wi-Fi › Known Networks | Delete stale SSIDs and duplicates |
| Location profile | Network › Locations | Create a new Location and rejoin |
| Power nap and wake | Battery/Power settings | Adjust wake options, test on power adapter |
Intel And Apple Silicon Notes
On Intel models, reset NVRAM and the SMC if dropouts started after hardware swaps or power events. On Apple Silicon, a full shutdown and a fresh boot covers those resets. Keep macOS current so Wi-Fi chip firmware stays in step.
Signal Hygiene At Home
Place the router high and clear of thick walls. Keep it away from baby monitors, cordless phones, and older Bluetooth hubs. On mesh kits, wire nodes when possible to keep client traffic clean.
When To Replace Gear
Routers age. If yours is many years old or only 2.4 GHz, upgrade to a dual-band 802.11ac or 802.11ax model. Pick brands with steady firmware updates and a clean admin page.
Test Plan You Can Repeat
After each change, run three checks: a large download, a video stream, and a local file copy. Log time and place. If all three stay steady, you’re done.
FAQ-Free Bottom Line
If your Mac won’t stay on Wi-Fi, the fastest wins tend to be: forget and rejoin the network, update macOS and the router, pick calm channels, and review the router’s recommended settings. If nothing sticks, Wireless Diagnostics plus a clean network Location usually does the trick.
Quick checklist to end the guesswork: confirm updates on Mac and router, forget and rejoin the SSID, pick calm channels, use Wireless Diagnostics for a report, renew DHCP, test DNS, disable VPN or filters, create a new Location, prune Known Networks, and retest on a second Wi-Fi. If two days pass clean, you’re done.