The software is not officially supported anymore, and GoPro doesn't host a download for GoPro Studio on its site, but you can still download GoPro Studio from third-party sites.

It seems that GoPro hopes to rocket the improvement of Quik and get people over to the app, meeting their ends. GoPro, the desktop video editor bundled with the GoPro Quik app, was discontinued in August 2019 by the company, and will no longer be included in the installer package. But GoPro has officially confirmed the end-of-life for the free editor. All those editing work could be easily completed with GoPro Studio - an official free video editing software by GoPro for both Windows and Mac OS. Post-production goes a long way to create awesome and professional GoPro videos with high quality up to 4K or HD, in which we can trim off disappointing parts, add background music and opening titles, create slow or fast motion video, and compress large file size sometimes, etc. It's a safe bet that whoever reads this post is in a position for video editing.

Download gopro app for mac