The Creative Cloud desktop app will download automatically; use it to install Premiere Pro. macOS System Requirements for Premiere Pro
The official way to use Premiere Pro for free is through Adobe’s 7-day free trial. This trial gives you the full, updated version of the software on macOS with no feature restrictions. Adobe Premiere Pro 2022 Free Download macOS
Go to the Adobe Premiere Pro Free Trial page. The Creative Cloud desktop app will download automatically;