If I’m not mistaken, liveCD uses broadcom-wl driver. Maybe you have more luck with that driver than with b43.
Uninstall b43-fwcutter and b43-firmware and install broadcom-wl.
Finally got to try this, and I’m not sure if it worked or not, because the wifi option that should be there when I click the top right in Gnome isn’t there. Like it doesn’t say Wifi, it just says Bluetooth and Battery. Though I was succesfully able to remove b43 using “sudo pacman -R b43-fwcutter”, and I guess b43-firmware was never installed, because that’s what the terminal said when I tried to remove it. The Networks option in the settings only showed “Wired” and “Network proxy” as well. Help?
So I’m trying to dual boot antergos on my 13" early 2011 macbook pro. The installation went fine, and I even had wifi during the installation. So I restarted, and when booting up it told me to go to here https://wireless.wiki.kernel.org/en/users/drivers/b43 and install it. I googled it, and I found that I could install b43-fwcutter and then b43-firmware, but it told me that the file was already there and asked me if I wanted to delete it, and whether I said yes or no, it told me the file was corrupted, something about PGP, and something about it being signed bad. So I tried to manually delete the files, but they weren’t there. What do I do? If it helps, my Macbook Pro model is 8,1. Thanks to anyone who can help.