I worked with p12 succesfully on Catalina. Then P13 appears and I "graded" up to Ventura via open source legacy patcher. Now P13 worked but with difficulties with the  Library when you add too many runtimes (up from P5). Then there was the upgrade that should work with Catalina and I have to think abaot a downgrade back to catalina or to find an Solution for the mac/Library. On win the P13 works  with win 10, but slow. For A-Sunbeam, you could try OSLP (Freeware) to upgrade to Catalina. But with care and Backup. An advice: First boot from a stick, and when P13 works then change the boot-sequenz. Do somebody have experiences with P13-Library in Ventura or below? kind regards