Genuine Apple WiFi 802.11ac Bluetooth 4.0 Upgrade Kit Adapter For iMac 2009-2011 | eBay
Wifi icon BLANK-Can't turn on Wifi iMac - Apple Community
Connect to the internet with your Mac - Apple Support
How to Forget a WiFi Network on a Mac : HelloTech How
If you need help with your Wi‑Fi password - Apple Support
EDIMAX - Legacy Products - Wireless Adapters - 11AC WiFi USB Adapter for MacBook, Nano Size to Plug it & Forget it, Upgrade for Faster Performance, Support Mac OS 10.7~10.11 (5GHz Band Only)