Finally got this to work for ME this week. I have an early 2011 13" MBP (A1278) running on the latest updates of OSX High Sierra. I used the the Continuity activation tool because I couldn't delete the IO80211Family kext extension. I copied and modified the IO80211 file on my desktop, deleted the extension from the library and ran Kext Drop, I reset my Mac and it worked flawlessly with my iPhone 7 plus and iPad Air 2. Update (15 Dec 2017) - MacOS 10.13.2 update disables Handoff, but I was able get Handoff/continuity working again by repeating the steps. So far this guide still works on the latest updates to MacOS. Update (09 Jan 2018) - MacOS 10.13.2 Supplemental Update - I just installed this latest security update and good news the update did not disable continuity on my machine.