1. "GarageBand cannot be opened because it is from an unidentified developer"
⚠️ If you’ve never owned GarageBand before, you cannot directly download 10.1.6 from Apple. You would need a second Mac with a newer OS to download the latest version, but that won’t run on El Capitan. In that case, consider Logic Pro 9 (if you have disks) or switch to or Reaper (still compatible with El Capitan). garageband mac os x el capitan 10116 download extra updated
Apple restricts new downloads, but it does allow you to download legacy versions if your Apple ID has a history with the app. Install GarageBand on old MacBook High Sierra garageband mac os x el capitan 10116 download extra updated