Merge pull request #618 from IENT/updateReadme

Update readme

Author: ChristianFeldmann

README.md

@@ -30,13 +30,17 @@ Screenshot of YUView:
 
 ## Download
 
-You can download precompiled binaries for Windows and MAC from the [release site](https://github.com/IENT/YUView/releases) which are all compiled on travis CI. On the release page you can find:
+You can download precompiled binaries for Windows and MAC from the [release site](https://github.com/IENT/YUView/releases) which are all compiled on Github Actions. On the release page you can find:
 
  - Windows installer
  - Windows zip
  - Mac OS Application
  - Linux Appimage
 
+On MacOS, just extract the zip file to your Application folder and remove it from quarantine:
+
+> xattr -d com.apple.quarantine /Applications/YUView.app
+
 If you have Ubuntu 22.04 or newer, you can get YUView from the official repo: `sudo apt install yuview`. For other Linux based platforms we are also on [flathub](https://flathub.org/apps/details/de.rwth_aachen.ient.YUView). More information on YUView on Linux can be found in out wiki page ["YUView on Linux"](https://github.com/IENT/YUView/wiki/YUView-on-Linux). 
 
 If none of these apply to you, you can easily [build YUView yourself](https://github.com/IENT/YUView/wiki/Compile-YUView).