http://dnbible7sqskwppgaqohboxz7u5kzffjzdx3lxzpjtt3s6tzeiytb5ad.onion/bible/operating-systems/tails/got_problems/index.html
Install rEFInd (if you use a Mac with El Capitan or later, rEFInd may not install properly). Then temporarily disabled SIP: hold command + R when you see the Apple logo after restarting, then go to Utilities -> Terminal, then type “crsutil disable” in the Terminal window then press Enter, then restart as normal and install rEFInd, then repeat the process but this time type “crsutil enable,” turning SIP back on.