safari-web-extension-converter requires at least Safari 14.0 to run.

I am on Catalina and have XCode 12 beta 6 and Safari Technology Preview installed but am getting the following :-

Code Block
% sudo xcode-select --switch /Applications/Xcode-beta.app 
Password:

Code Block
% xcrun safari-web-extension-converter /Users/aarongray/Desktop/DevelopingASafariWebExtension
safari-web-extension-converter requires at least Safari 14.0 to run. requires at least Safari 14.0 to run.
Unable to parse manifest.json at file:///Users/aarongray/Desktop/DevelopingASafariWebExtension


I have set the Safari Technology Preview as the default browser but that did not help.

Solved Answer

You need to have the beta of Safari 14 installed to use safari-web-extension-converter. You can download it from here.

4 Replies

You need to have the beta of Safari 14 installed to use safari-web-extension-converter. You can download it from here.
Have installed Safari 14 Beta for Catalina :-

https://developer.apple.com/download/more/?=Safari
Safari 14 was released for macOS Mojave and Catalina today.
I'm having this issue with Safari 14.0.1 on Catalina 10.15.7