Apple WiFi + Bluetooth 4.0 Card to miniPCIe Adapter for iMac 2009, iMac 2010 and iMac 2011 | www.osxwifi.com | Native Support for Apple Broadcom BCM94360CD and BCM943602CDP for PC | HACKINTOSH | Mac Pro | iMac
How to Reset Your Mac's Bluetooth Module to Fix Connection Issues - MacRumors
Differences Between Mid-2017 and Early 2019 iMac Models: EveryMac.com