MacOS – Wifi Keeps Dropping Macbook Pro 13in Retina Early 2015

macbook promacoswifi

I've tried everything I can think of. Resetting the router, changing the channel number and band.

The internet connection is fine, and then just hangs for a minute or 2, then returns to normal.

The wifi icon remains connected, and I have the latest 10.10.4 update installed. At first I thought it was a DNS bug with Yosemite, and have played with the settings such as changing DNS provider, changing the IPV6 to IPV4 only etc.

Driving me nuts. Has anyone had a similar problem? I've checked the surroundings with wifi scanners and have chosen the best channel available.

  1. One thing I have noticed, it seems a lot more reliable on 5GHz as opposed to 2.4Ghz
  2. It seems to affect my Macbook Pro Retina 13in Early 2015 a lot more than the other devices on the network.
  3. I'm using a Virginmedia Superhub 1.

Best Answer

I was having a similiar issue with 10.10.3 which was not corrected when I updated to 10.10.4. Many, many things were tried before I got it to stay connected to WiFi reliably, however deleting the networking PLIST files seems to be what finally did it.

The Fix:

  • Disable WiFi
  • Open Finder
  • Press Cmd+Shft+G to go to the folder /Library/Preferences/SystemConfiguration/
  • Delete (or move) the following files:
    • com.apple.airport.preferences.plist
    • NetworkInterfaces.plist
    • preferences.plist
  • Restart your computer
  • Re-enable WiFi

The Other Things I Tried:

  • Reset PRAM
  • Reset SMC
  • Used Onyx to clear caches, run update scripts, etc.
  • Disabled AirDrop by using Terminal to run sudo ifconfig awdl0 down
  • Kext Utility to reset kext permissions, followed by...
  • Disk Utility to verify/correct permissions.
    • In my case errors were found, and I had to...
    • Reboot in Recovery Mode (press Cmd+R as boot sound, hold until you see the Apple logo), use Disk Utility, however no errors were detected
    • Disabled FileVault, waited for decryption to complete
    • Reboot in Recovery Mode, use Disk Utility, some errors corrected then return value 8 and was told I had to backup, format, and restore to the drive.
    • Ran Disk Utility repair again and no errors were detected (then I ran it again for good measure)
    • Rebooted and Disk Utility found no errors.
    • Still had WiFi disconnects...
  • Deleted the AirPort plist files (fix above) and WiFi has been stable.
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