If you are having trouble with a slow internet connection with your wireless airport card, you might want to upgrade firmware-b43-installer or firmware-b43legacy-installer, depending on what you use. It has to be either b43 or b43legacy. I ported an older version (019-3) and renamed it to a version later than 019-8, so it can be automatically installed by people who have 019-8 already running. To get this package:
sudo apt update
sudo apt upgrade firmware-b43-installer
Replace firmware-b43-installer by firmware-b43legacy-installer if you use the latter.
If you have both packages installed remove them both and install only the one you need. See the installation instructions for more information about wireless connections.
You can also look at the airport page.
It works for: Broadcom Inc. and subsidiaries BCM4321 802.11a/b/g/n [14e4:4328] (rev 05) as well (marked as partially supported in the table), though performance is still low compared to native Mac OS X kext drivers on the same machine.
Are these cards that were used by Apple?
That is original BCM94321MC Apple WiFi card, but from later Mac / MacBook Pros (Intel) – probably the only one (that I know of) that has 802.11n (a/b/g/n) capabilities and due to universal binary kext support provided by Apple since Mac OS X 10.4.11 (Server) works also with any Power Mac G5 (PowerPC) installation, therefore is the most versatile. Installed inside my machine via miniPCI-E to PCI-E adapter and internally connected with Mac’s original build-in antennas.
Interesting, such a card might then be in my early Intel MacBook Pro. Thanks for the update. I can now safely add firmware-b43-installer as only driver in the mintppc64 preseed file.