MacBook Pro 13" 2017 version will not allow me to download any new apps, it says I need the new 10.5 update, when I go in to update it, there is not new updates. Cannot download any new updates from Apple Support
I just got a refurbished MacBook Pro 2017 13" version, there are no new updates available. When trying to download any new apps from the App Store it says cannot be installed on "Macintosh HD" because macOS version 10.15 or later is required. What does this mean? How do I install a new update if there aren't any available? I have tried uploading on Apple Support site but once the download is completed it does not allow installation because it is not a recognized site that I downloaded from. Help!! Should I send this computer back??