若希望更快获得更新并抢先体验新功能，可使用 Telegram Desktop 的 Beta 版。
正式版更新频率较低，但测试更充分。
各平台 Beta 版下载链接：
Windows x64 Setup
Windows x64 Portable
Windows on ARM Setup
Windows on ARM Portable
Windows Setup
Windows Portable
Mac OS X 10.13+ Setup
Linux 64 bit with glibc >= 2.28
Just install it on top of your current Telegram Desktop and there you go.
The up-to-date versions of Telegram Desktop support Windows 7 and later, macOS 10.12 and later and 64 bit Linux. But there are old versions available:
v4.9.9 Setup for macOS 10.12
v4.9.9 for Linux with glibc < 2.28
v2.4.4 Setup for OS X 10.10 and 10.11
v2.4.4 for Linux 32 bit
v1.8.15 Setup for Windows XP / Vista
v1.8.15 Portable for Windows XP / Vista
v1.8.15 Setup for OS X 10.6 and 10.7
v1.8.15 Setup for OS X 10.8 and 10.9