Can't load Garageband
I understand that I can use Garageband to digitize my LP collection. However, when I went to the App Store to download Garage band I got the message "GarageBand can’t be installed on “Bob's MacPro” because macOS version 11 or later is required." I don't understand why since I am using 10.13.6. What is wrong or what am I doing wrong? I own the LP's and do not intend to sell or give them away. I just want to listen to them on my current equipment.