I got it working by installing the Broadcom 802.11 Linux STA wireless driver source with:
$ sudo apt-get install bcmwl-kernel-source -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1508719 Title: 15.10 does not offer broadcom drivers for BCM4360 wireless on macbook air To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1508719/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs