This started happening a couple weeks ago and I am at a loss. The issue has been happening on every wifi I have connected tom: my phone via tethering, my university's guest and student wifi, and third party wifi at a coffee shop.
This is what happens: After a reboot and connecting to any wifi it will work for between 30 seconds and 5 minutes, then it still says that it is connected but no web pages will load (tested in safari and chrome.)
What I've tried:
• Reseting PRAM
• Reseting SMC
• Removing all known wifi networks
• Creating another user account (same issue)
• Changing DNS IP addresses
• Reinstalling the OS (while preserving user data)
• Tethering to phone's network via BlueTooth with wifi off (same issue, stops working after a few minutes)
And finally I have tried installing windows 10 with bootcamp. When booted into windows the issue does not appear, so because of this it seems to me that it is not a hardware issue. So I am really lost, does anyone have any other ideas I could try?
Best Answer
I had faced same. Sometimes cable connected to wifi card becomes loose which can cause this issue.
Can you check once what RSSI you are getting when you are scanning the the Wi-Fi network? Usually macOS at -70 dBm RSSI shows very less connectivity but windows works fine.
you will get all the network list. All the scanned network will have a field "Signal/Noise", where you will get your RSSI value.