[gergles]

He means the former, which is called "Telegram Desktop".

The Mac-specific App Store version is a better app, but has been abandoned in favor of the (crappy) "Telegram Desktop."

[szastupov]

Judging from recent updates it's still alive. The version in AppStore might be stale (not sure) but if you install the version from site (https://macos.telegram.org) you'll get frequent update.e

But I must admit that amount of clients is confusing.