I experienced a similar issue on a MBP mid-2012 recently - Bluetooth recognised but no WiFi. My adapter is a BCM4331.
dmesg in the terminal revealed a message suggesting visiting wireless.wiki.kernel.org for Broadcom drivers.
That website states your BCM4360 Broadcom WiFi adapter is unsupported, however there is a possible solution involving propietary drivers (covered further down).
This driver works pretty well, however it doesn't support 5GHz networks and during my usage I found it would drop the connection intermittently.
To install the b43 driver, run the following command in a terminal
# apt install firmware-b43-installer
and rebooting eOS
This is the propietary driver available from Broadcom, with full feature support. This hasn't been extensively tested by myself as I've only recently got this working. Debian's Mac documentation was extremely helpful.
Install your kernel's headers and the propietary driver sources:
# apt install linux-headers-generic-hwe-20.04 && sudo apt install broadcom-sta-common broadcom-sta-source broadcom-sta-dkms
(If you are not running Ubuntu 20.04 or Elementary OS 6, replace the
linux-headers-generic-hwe-20.04 package with
linux-headers-$(uname -r). Do note that this alternative method requires you to fetch new headers manually when the kernel is updated, otherwise your WiFi will stop working)
Once installation is complete, unload the old kernel modules for the modem:
# modprobe -r b43
# modprobe -r bcma
To prevent these modules from reloading on boot, create a new
blacklist-b43.conf file in
/etc/modprobe.d/ with the following contents:
At this point, you can reboot eOS.
Alternatively you can reload the wl kernel module and start using the WiFi adapter immediately:
# modprobe -r wl
# modprobe -r cfg80211
# rfkill unblock
# modprobe wl