SUCCESS - MacBook Pro mid-2009 (5,3). The DosDude Catalina Patcher worked perfectly, very first try. The Core 2 Duo runs Catalina better than I expected. : r/CatalinaPatcher
Download macOS Catalina Patcher | MacUpdate
Mac OS Catalina Running on Mid 2009 MacBook - YouTube
How to install macOS Catalina on an unsupported Mac