Just a heads up - seems GPGTools has issues with High Sierra; those using PGP might want to hold off.
https://gpgtools.tenderapp.com/discussions/beta/2348-macos-h...
https://gpgtools.tenderapp.com/discussions/beta/2348-macos-h...
I deem that unusable.
It's just too slow a beast, all of that. GPG (and especially email integration) is dying. Let's hope it gets a new life one day in the future.