Because Apple removed the download link. If you try to install from the App Store today, you get the bloated 10.4.8. But if you have the GarageBand_10.3.5.dmg stashed on a hard drive, you own a piece of abandonware that just works .
Searching for "GarageBand 10.3.5 DMG" often leads to forums or suspicious websites. Garageband 10.3.5 Dmg
Grading rubrics (brief)
To install GarageBand 10.3.5, follow these steps: Because Apple removed the download link
Yes, GarageBand is completely free to download and use on all compatible Mac computers. The Mac App Store provides the software at no cost, making it one of the best free digital audio workstations available. This pricing model has been in place since 2017 when Apple made GarageBand free for all Mac users with a valid Apple ID. Additional instruments and sounds may be available through in-app purchases, but the core software and a substantial library of content are entirely free. Searching for "GarageBand 10