Overall, GarageBand 6.0.5 received positive reviews for its ease of use, robust feature set, and seamless integration with other Apple products.
If you previously owned GarageBand '11 (version 6.x), you can usually re-download it from the tab in the App Store. Internet Archive: Garageband 6.0.5 Download
On macOS 10.13 High Sierra, it may take up to 10 minutes to open the first time. 2. How to Download Overall, GarageBand 6