Wifi not detected on 2012 IMac in 11.0

Hello,

Please can I have some help.

I have several Intel IMac's running 10.0.4, these work great. I upgraded one to 11.0.0 today however the wifi card is not detected.

In a working 10.0.4 setup I see this in dmesg:

[ 3.617493] Bluetooth: hci0: BCM20702B0 Generic USB Class 1 @ 20 MHz

[ 3.623046] wlan0: Broadcom BCM4331 802.11 Hybrid Wireless Controller 6.30.223.271 (r587334)

I presume this driver is no longer present in 11.0.0.

Pastekodi from both versions here -

http://ix.io/4qyY

http://ix.io/4qyZ

I could do with a hint on how to resolve this. Thanks in advance.

I think the NIC is actually PCI

lspci

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller (rev 09)

00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09)

00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)

00:16.0 Communication controller: Intel Corporation 7 Series/C216 Chipset Family MEI Controller (rev 04)

00:1a.0 USB controller: Intel Corporation 7 Series/C216 Chipset Family USB Enhanced Host Controller (rev 04)

00:1b.0 Audio device: Intel Corporation 7 Series/C216 Chipset Family High Definition Audio Controller (rev 04)

00:1c.0 PCI bridge: Intel Corporation 7 Series/C216 Chipset Family PCI Express Root Port 1 (rev c4)

00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (rev c4)

00:1c.3 PCI bridge: Intel Corporation 7 Series/C216 Chipset Family PCI Express Root Port 4 (rev c4)

00:1c.4 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 5 (rev c4)

00:1d.0 USB controller: Intel Corporation 7 Series/C216 Chipset Family USB Enhanced Host Controller (rev 04)

00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a4)

00:1f.0 ISA bridge: Intel Corporation Z77 Express Chipset LPC Controller (rev 04)

00:1f.2 SATA controller: Intel Corporation 7 Series/C210 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)

00:1f.3 SMBus: Intel Corporation 7 Series/C216 Chipset Family SMBus Controller (rev 04)

01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 640M Mac Edition] (rev a1)

01:00.1 Audio device: NVIDIA Corporation GK107 HDMI Audio Controller (rev a1)

03:00.0 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM57766 Gigabit Ethernet PCIe (rev 01)

03:00.1 SD Host controller: Broadcom Inc. and subsidiaries BCM57765/57785 SDXC/MMC Card Reader (rev 01)

04:00.0 Network controller: Broadcom Inc. and subsidiaries BCM4331 802.11a/b/g/n (rev 02)

06:00.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03)

07:00.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03)

07:03.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03)

07:04.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03)

07:05.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03)

07:06.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03)

08:00.0 System peripheral: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03)

lsusb

Bus 002 Device 007: ID 05ac:828b Apple, Inc. Bluetooth USB Host Controller

Bus 002 Device 004: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth)

Bus 002 Device 003: ID 0424:2412 Microchip Technology, Inc. (formerly SMSC) Hub

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 001 Device 003: ID 05ac:8511 Apple, Inc. FaceTime HD Camera (Built-in)

Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 003 Device 004: ID 05ac:0250 Apple, Inc. Aluminium Keyboard (ISO)

Bus 003 Device 003: ID 05ac:1006 Apple, Inc. Hub in Aluminum Keyboard

Bus 003 Device 002: ID 25a7:0122 Areson Technology Corp HCY RC

Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Solution for anybody else with this problem. £20 on Amazon.