OK, this is somewhat surprising. One of the sites I visit on a daily basis (in fact, quite a few times each day) is www.macupdate.com. It is useful for finding out what Mac software has updates. Well, a few minutes ago when I visited there, I saw one for macOS Catalina Patcher for Mac. Here is the link:
www.macupdate.com
Note that it says under "What's new ,,,":
"Version 1.3.4:
I'm hoping that dosdude1 can clear this up. I just might go with the OS 10.15.4 Combo Updater.
Download macOS Catalina Patcher for Mac | MacUpdate
Download the latest version of macOS Catalina Patcher for Mac for free. Read 20 user reviews and compare with similar apps on MacUpdate.

Note that it says under "What's new ,,,":
"Version 1.3.4:
- Due to major issues with 10.15.4, this version of Catalina Patcher has been reverted to 10.15.3 support only"
I'm hoping that dosdude1 can clear this up. I just might go with the OS 10.15.4 Combo Updater.
Last edited: