Guest TECK Posted February 10, 2022 Posted February 10, 2022 I purchased an eBay kit to upgrade Bluetooth at 4.2: https://i.ebayimg.com/images/g/2YUAAOSwI59aOnm9/s-l400.jpg Genuine Apple WiFi 802.11ac & Bluetooth 4.2 Upgrade Kit Adapter *Mac Pro 4,1/5,1 | eBay Or WiFi ac + BT 4.0 kit for your 4,1/5,1 with lower price, go here . you can go here. www.ebay.com Into their instructions, they say to execute the following commands: Code: csrutil disable sudo mount -uw / sudo /usr/libexec/PlistBuddy -c "Set:Mac-F221BEC8:ContinuitySupport true" "/System/Library/Frameworks/IOBluetooth.framework/Versions/A/Resources/SystemParameters.plist" sudo -E perl -pi -e "s/\Mac-00BE6ED71E35EB86/\Mac-F221BEC8\0\0\0\0\0\0\0\0/"... Read more Source: MacRumors
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