hi JV7 ,
Your tag is QuickBooks Desktop, not QuickBooks Desktop for Mac.
Do you need to upgrade your QuickBooks 2016 Windows to 2020 Windows on your Mac?
I'm here to help, @JV7.
You'll need to backup your three company files first, then restore them in your QuickBooks 2020. Let me show you how.
Backup copies of your QuickBooks company file provide you insurance against accidental loss of your data. If you lose any data for any reason, you can restore your company file using the backup copy.
To Back Up:
If you need more help about restoring your back up file, click Command + F on your keyboard, then type restore in the search field.
Feel free to leave a comment below if you need further assistance. I'll be around to help.