FWIW, I downloaded the .pkg again (from the SE site) and it installed without incident to 2.880.

Thanks. I had only seen the App Store's download. I downloaded the .pkg from your link but have not been able to install from it. When I attempt to, the installer opens but does not do the...

Version 2.88 of the Mac client does not seem to be available. Is it? If not, when is it expected?