1) Download the latest release of GoodSync for Mac: https://www.goodsync.com/download/goodsync-v10-mac.dmg
2) Run the installer.
3) Drag the GoodSync icon to the Applications folder >> double-click the GoodSync icon to run.
4) GoodSync has been installed. Now you are ready to create your first GoodSync Backup/Synchronization job. Click here for the tutorial.