Internet Slow on macbook pro with Big Sur

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Created Jan ’21

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I have three computers, two running Mojave with no problems and one new macbook pro with Big Sur. The internet speeds on the Big Sur computer are ~8Mbps while on the others ~100Mbps. The router is new, other devices are fine, just the macbook. I reinstalled the OS and did all the checking and troubleshooting advised on other message boards, but still no solution. I don't have a VPN, etc. I'm at a complete loss. Has anyone else been able to solve this issue?

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iamprats OP

Jan ’21

I have the exact same issue as well. MBP 2019. An SMC reset solves it temporarily but it's back within a few minutes of browsing, and it's happening across all the browsers. For some reasons, using Safari seems to trigger it but I can't be sure.

Wifi speed on other devices (iOS, Windows, Android) is 100 MBPS whereas on the MBP w Big Sur, it's ~25 at best. Tested both Wifi and wired, but it's the same.

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