In 12, Apple removed the possibility of downloading 3rd party that weren't available on the . Safari extensions Safari Extension Gallery Hopefully, there is a way to bypass this issue, and I’ll show it to you in this story. We’ll use the extension as our example for this tutorial. Muz.li First, let’s download the extension. Once, it’s downloaded, you should have the following file in your download folder: Now, let’s open this weird app (if you’re not a developer of course 😊) called . To open it, just do a simple Spotlight search by hiting . Terminal Cmd+space Once it’s open, type the following line and hit enter: cd Downloads This will tell the app to open your Downloads folder. Then, you’ll copy the following line, but you’ll replace “Muzli” by the extension you’re trying to download. xar -xf Muzli.safariextz This will unpack your extension. Now, open Safari, and hit . This will open the settings window. And navigate to . Cmd+, Advanced Now, tick the last checkbox, this will enable development mode. Then in the menu, go to the extension builder. Development Once you’ve opened the extension builder, you should see a window popping up. Now, you’ll select the unpacked folder that will have at the end of it’s name . .safariextension Once you’ve opened the extension, just click on the button to install your extension. execute And you’re done 🎉 If you liked this story, don’t hesitate to spam that clap 👏 button 😊.