You can also download the deprecated objective-c version. This version is no longer supported, but can run on 10.8+ systems.
v 2.96.94514 25.04.17
Remove recent gifs
Messages context menu improvements
Bug fixes and improvements
v 2.30.51442 03.01.17
Delete messages for everyone. When you delete your messages in groups and one-on-one chats, you can now choose to delete them for everyone in the chat, not just yourself. This works only for recently sent messages (same as editing).
T.me links. Use the short and personal t.me/username instead of telegram.me to link to any Telegram profile, channel or public group.
‘Report spam’ button added to Secret chats.
v 2.28.51253 20.11.16
Groups in common. A new option in your contacts' profiles that shows a list of all groups you share with that person.
Squashed several bugs, including an issue that would cause unusually high CPU usage.
Telegram is a cloud-based mobile and desktop messaging app with a focus on security and speed.