my Macbook pro 13inch from2017 is running 10.15.5 but won't upgrade to 10.15.6

Try using the macOS Catalina 10.15.6 Combo Update. Be sure to use Safari for the download.

johnfrommount eliza wrote:

I can't find a download of macOS Catalina 10.15.6 Combo Update on safari 🤨

...so what happens when you click this link---->https://support.apple.com/kb/DL2048?viewlocale=en_US&locale=en_US?

What happens when you try?