Can you upload stories using a Mac App?
The answer is no. You need to use a smartphone. Here the answer by Telegram "no any reason to post from desktop"

Can you watch stories without Telegram Premium? The answer is yes, you don't need premium plan.

If you write a reply, where does this reply go? Answer: in the normal chat with such person

Telegram Stories is now official fully compatible with MacOS 10.12! Telegram Stable just released

Future Windows, Linux, etc. Telegram Stories compatible apps can be found here @InstallersTelegram

Stories and 10 Years of Telegram
🇺🇸 https://perma.cc/V7PY-CZKS
🇩🇪 https://perma.cc/59GQ-ETM6
🇪🇸 https://perma.cc/W3TC-8D8Y
🇫🇷 https://perma.cc/Q4YB-HG6M
🇮🇹 https://perma.cc/J52D-4DK7
🇳🇱 https://perma.cc/8MLV-7M9G
🇺🇦 https://perma.cc/C8Z8-ZJ4Y
🇷🇺 https://perma.cc/3G8K-QUJS
🇵🇹 https://perma.cc/W7AH-EFLB

Telegram Stories
🇺🇸 https://perma.cc/5BXK-LG88
🇪🇸 https://perma.cc/HPQ7-YE5F
🇮🇹 https://perma.cc/83A4-ZFX5

Pavel Durov
First https://perma.cc/UH9D-77BT
Last https://perma.cc/GSE7-FXAY

6 minutes that will change your life on Telegram FOREVER!
We are showing JUST SOME!!! of the features available, which make TELEGRAM THE BEST SOCIAL WORLDWIDE! (even if people still don't understand that 🤦‍♂️ ...)
https://t.iss.one/NoComparisonTelegram

YES, TELEGRAM IS THE BEST SOCIAL FOR SCIENCE TOO!
https://t.iss.one/GenRevolutionOfficial/212

More infos
https://t.iss.one/JoinShareableChatFolders/16

Music by
https://t.iss.one/Pikayzo