Big Sur Network Connectivity Issue
I upgraded to Big Sur two days ago (11/12) and throughout yesterday (11/13) I've had this weird issue where my 13in 2020 MacBook Pro seems to lose access to my local network. The laptop stays connected to WiFi fine, but I am unable to ping google.com or my router's IP address. Running Network Diagnostics yielded no problems with system WiFi, but proposed a DNS issue. I have many devices in my home (including a second 15in 2019 MacBook Pro on Big Sur) and everything else works fine.
So far, I've tried the following unique things (in order) but none of them have resolved fixed the issue:
- Reboot
- Reset SMC
- Reset NVRAM/PRAM
- Added Cloudflare's 1.1.1.1 and Google DNS
- Run Apple Diagnostics utility (Option-D on startup)
- Run first aid from Disk Utility for Macintosh HD and Macintosh HD - Data
- Reinstall macOS Big Sur
Key Observations:
- The laptop stays connected to my home WiFi network
- The laptop is unable to connect with local devices (including a network Time Machine Backup disk)
- The laptop is unable to ping local devices or websites
On each reboot, the laptop works well for up to an hour or two before exhibiting the symptom.
From some searching online (here, here, and here) and in Apple forums (here, here, and here), it appears that a similar if not identical issue was present in betas and the public release.
If anyone has any info info about this, PLEASE let me know. The machine is used for remote teaching so the interruptions during class time is particularly devastating.
MacBook Pro with Touch Bar