Check the same network on another device, turn Wi-Fi off and on, restart the Mac and router, then run Wireless Diagnostics. Forget the network or change TCP/IP/DNS settings only after recording the current configuration. A Mac that connects but loads nothing may need only a DNS change, so note which of the two you see.
What this covers
- Supported macOS computers using a normal home Wi-Fi network
What it does not cover
- ×Managed Macs where an organization controls network profiles
Try in this order
0 of 4 completedTest another device on the Wi-Fi
ReversibleIf another device also cannot load a public website, restart the router or contact the internet provider first.
Toggle Wi-Fi and restart the Mac
ReversibleTurn Wi-Fi off and on from Control Center, then choose Apple menu › Restart if access does not return.
Run Wireless Diagnostics
ReversibleHold Option while clicking Wi-Fi, open Wireless Diagnostics, and follow the report without joining another network during analysis.
Forget and rejoin the network
Reset / data riskIn System Settings › Wi-Fi › Details, forget the network only after confirming its password and any custom network settings.
Evidence ledger
Sources behind this answer
Exact questions
Common questions about “Mac is connected to Wi-Fi but the internet does not work”
Why does Wi-Fi connect but no internet on Mac?+
The router may have a problem or DNS may be wrong.
Do other devices work?+
If not, check the router.
Have I tried renewing the network settings?+
Renewing the DHCP lease or forgetting the network can help.
Could DNS be at fault?+
Try a public DNS server in the network settings.
Should I try a new network location?+
Creating a new network location in the network settings can clear odd settings without touching your files, and is a good step before reinstalling anything.
Could VPN or security software interfere?+
Yes. A VPN or filtering tool can stop traffic even when Wi-Fi shows connected. Disable it temporarily to test.
What if the Mac connects to some networks but not others?+
If it works on a phone hotspot but not at home, the router is the likely cause. Check the router's settings and restart it. If the Mac fails everywhere, look at its network settings.