I recently installed elementary OS Juno on my MacBook Pro 10,1 (Early 2013), dualbooting with MacOS. After initially not having any wifi at all after installation, I followed the instructions here which I usually do when installing new distros and successfully installed firmware-b43-installer.
However, I cannot detect any 5 GHz networks, only 2.4 GHz ones, despite having a compatible wifi card. 5 GHz networks are detected on MacOS, and were also detected on Ubuntu 18.10 which I used before installing elementary OS. I also updated the kernel to 4.19.66-041966-generic using UKUU. I also set /etc/default/crda to my country code which was suggested somewhere.
Some additional information about my system:
lspci -nn -d 14e4:
04:00.0 Network controller : Broadcom Inc. and subsidiaries BCM4331 802.11a/b/g/n [14e4:4331] (rev 02)
lo no frequency information. enx00e04c680a96 no frequency information. wlp4s0b1 13 channels in total; available frequencies : Channel 01 : 2.412 GHz Channel 02 : 2.417 GHz Channel 03 : 2.422 GHz Channel 04 : 2.427 GHz Channel 05 : 2.432 GHz Channel 06 : 2.437 GHz Channel 07 : 2.442 GHz Channel 08 : 2.447 GHz Channel 09 : 2.452 GHz Channel 10 : 2.457 GHz Channel 11 : 2.462 GHz Channel 12 : 2.467 GHz Channel 13 : 2.472 GHz
I'm no expert but as far as I understand it, iwlist chan suggests the wifi card does not support 5 GHz (?), but as I wrote above I know for a fact that it does. Is there anything I can do to fix this problem? I need to be able to use my 5 GHz network since 2.4 GHz is unacceptably slow.
Thanks a lot for any help!