Include notes about running the app on macOS in readme

Author: Tyrrrz

Readme.md

@@ -50,6 +50,10 @@ To learn more about the war and how you can help, [click here](https://tyrrrz.me
   - 📦 [AUR](https://aur.archlinux.org/packages/discord-chat-exporter-cli): `discord-chat-exporter-cli`
   - 📦 [Nix](https://search.nixos.org/packages?query=discordchatexporter-cli): `discordchatexporter-cli`
 
+> **Important**:
+> To launch the GUI version of the app on MacOS, you need to first remove the downloaded file from quarantine.
+> You can do that by running the following command in the terminal: `xattr -rd com.apple.quarantine DiscordChatExporter.app`.
+
 > **Note**:
 > If you're unsure which build is right for your system, consult with [this page](https://useragent.cc) to determine your OS and CPU architecture.
 
@@ -74,4 +78,4 @@ To learn more about the war and how you can help, [click here](https://tyrrrz.me
 ## See also
 
 - [**Chat Analytics**](https://github.com/mlomb/chat-analytics) — solution for analyzing chat patterns of Discord users, using exports produced by **DiscordChatExporter**.
-- [**DiscordChatExporter-frontend**](https://github.com/slatinsky/DiscordChatExporter-frontend) — convenient viewer for exports produced by **DiscordChatExporter**.
+- [**DiscordChatExporter-frontend**](https://github.com/slatinsky/DiscordChatExporter-frontend) — convenient viewer for exports produced by **DiscordChatExporter**.