Thank you for asking. If you want to remove drm from books downloaded from Amazon, Epubor Ultimate is highly recommended here. Here is the detailed page: https://www.epubor.com/ultimate.html
If you do not know how to use this software, we can teach you. Also, here is the tutorial: https://www.epubor.com/epubor-ultimate-user-guide.html
Any further question, please feel free to contact us via support@epubor.com
What do I need to buy from Epubor to download Amazon ebooks
and change the format to epub to read on my Mac mini and my iPhone?
Will you please tell me what applications I will need for every step in the process?
Thanking You in advance,
Wilma Neverovich