Proton Mail macOS desktop client BETA is now available at the Proton.me site. The current beta is 0.9.3. So far, looks good. Q: Does it allow access to other email services? A: No. Not yet anyway. - - I'm testing it because I'm fed up with (A) Apple coding bugs into Mail, then ignoring them. (Sound familiar?) (B) Apple's degenerated 'Support' system, all levels. (C) Apple bombing or bringing down their iCloud Mail services and never bothering to tell its customers. *GRR* I've already been using Proton Mail from day one for my PRIVATE email. iCloud eMail service gets all my other junk, for now.