Authy has been a widely used two-factor encryption solution for several years and is one of the few with programs for Windows and Mac.
Abandoned many months before the original plan
But on 19 March this year, the programs for Windows and Mac will be discontinued, and it is therefore important that you get another solution. At first, the plan was for the support to end in August, but now it is happening earlier. The mobile apps will continue to function, while for the desktop editions, it is up to the services to notify the users - to us it therefore sounds like you have to switch to the mobile apps:
“Advise your customers to switch to our mobile apps and share information on how they back up and sync their tokens across devices,” reports Authy owner Twilio.
Google Authenticator has one that seamlessly syncs across devices, but be aware that the solution is not encrypted and that Google does not offer programs for Windows or Mac either. Also, note that Authy lacks export options, so you will have to disable 2FA where it is used first if you want to switch to another solution.