Quick answer
The most common culprit is either the Mac or the router, not the provider. First turn Wi-Fi off and on again, then forget and re-add the network, and then check if the problem occurs on other devices. If the connection drops only on one Mac, the problem is in its settings; if it drops on all devices, restart the router.
How to recognize the problem
- Wi-Fi icon in the menu shows a connection exists, but internet doesn't work
- Connection drops every few minutes and comes back on its own
- Mac doesn't automatically connect to a known network after waking from sleep
- Speed is good on the phone, but pages load slowly or not at all on the Mac
Most common causes
Temporary network module glitch
macOS sometimes retains the old state of the Wi-Fi adapter, especially after waking from sleep or changing networks. Then the icon shows a connection, but traffic doesn't pass.
Saved network with bad settings
If the network password or security type changed, the Mac still tries the old record. That's why you need to forget the network and add it again.
DNS or IP address not obtained correctly
A wrong DNS server or IP address conflict causes the connection to exist but site names not to resolve. This often appears as a drop after a few minutes of use.
Router or 2.4 GHz channel
An overloaded channel, outdated router firmware, or too many devices on the same network produce the same symptoms on all devices, not just the Mac.
Interference or distance from the router
Metal surfaces, microwave ovens, and thick walls weaken the signal. The Mac then switches to another network or disconnects.
Step-by-step fix
- 1
Turn Wi-Fi off and on
Click the Wi-Fi icon in the menu and turn Wi-Fi off, wait about ten seconds, and turn it back on. If that doesn't help, do the same from
System Settings>Wi-Fi. This resolves most short drops after waking from sleep. - 2
Forget the network and add it again
Open
System Settings>Wi-Fi, clickDetailsnext to your network, and chooseForget This Network. Then reconnect and enter the password. This deletes the old record that may interfere with connecting. - 3
Check if the problem exists on other devices
Connect your phone to the same network and check if it also loses connection. If drops are seen on all devices, the problem is in the router or provider, so skip the steps that apply only to the Mac.
- 4
Restart the router and Mac
Unplug the router from power, wait 30 seconds, and plug it back in. Then restart the Mac via the
Applemenu >Restart. This order clears both the network equipment and the computer's cache. - 5
Change the DNS server
In
System Settings>Wi-Fi, clickDetailsnext to the network, then openDNS. Add a reliable public DNS, for example1.1.1.1and8.8.8.8, and remove old entries. If you're on a business network, skip this step or contact the administrator. If you don't want to change DNS, skip this step. - 6
Renew DHCP lease
In the same
Detailswindow, openTCP/IPand clickRenew DHCP Lease. This makes the Mac request a new IP address from the router, which helps with address conflicts on the network. - 7
Remove interference and check the channel
Move the Mac closer to the router and remove obstacles between them. If you have access to router settings, check if automatic channel selection on 2.4 GHz is enabled or switch to 5 GHz if available.
- 8
Update macOS
Open the
Applemenu >System Settings>General>Software Updateand install available updates. Network driver fixes often arrive through system updates.
If nothing helps
If nothing helps, you can reset the Wi-Fi service: in System Settings > Network, select Wi-Fi, click ... and choose Remove Service, then add it again via ... > Add Service. This deletes saved Wi-Fi settings for that service, so you'll need to reconnect to networks and enter passwords again. Then check if the problem is present on another user account on the same Mac: if it is, the cause is in the system or hardware, not in your settings. In that case, it's worth trying an Ethernet cable or USB Wi-Fi adapter to determine if the wireless module is the issue. If drops occur only on a business network, contact the network administrator as it's likely access rules or MAC address filtering.
How to prevent it
- After every password or router change, forget the network on the Mac and add it again
- Keep macOS updated and restart the Mac at least once a week
- Place the router in an open area, away from metal and microwave ovens
- Use the 5 GHz network for the computer if available, and leave 2.4 GHz for devices farther from the router
When to call a professional
If you've tried all the steps and drops recur on all networks and on another user account, it's likely a hardware failure of the Wi-Fi module or network. Then it's better to leave the inspection to a service center or IT support than to disassemble the Mac yourself.
IT infrastructure maintenance · Servers, networks, backup, security and helpdeskFAQ
Why does the Mac lose Wi-Fi only after waking from sleep?
macOS then tries to return to the network with the old adapter state. Turning Wi-Fi off and on or reconnecting to the network usually solves the problem. If it repeats, enable the option for the Mac not to sleep while on power.
Is the problem in the Mac or the router?
If the phone and other devices also lose connection, the problem is in the router or with the provider. If only the Mac has drops, the cause is in its network settings or wireless module.
Can changing DNS fix the drops?
Changing DNS helps when the connection exists but sites can't load. It won't fix the Wi-Fi signal drop itself, but it's useful as an additional step after basic checks.