DigitalLife AuralynX Series | USB Audio Capture Device – Convert Cassette Tapes to MP3, RCA & 3.5mm Input, Compatible with Windows, Mac & Linux, for Content Creators & Educators (AV202-B, 1-Pack)

You can get an inexpensive USB audio capture device like this that will plug into your Mac's USB port and allow you to import analog audio: https://www.amazon.com/Capture-Grabber-Recoder-Editing-Software/dp/B07BHGWBFY If you have any record player at all, even if it won't play 78s, you can still transfer the audio at 33 or 45 RPM and then use your audio editing software to speed it up to the proper pitch. That doesn't help with your Mini DV tapes, but there are probably lots of old DV camcorders sitting in closets whose owners might let you use them to transfer your tapes. They were popular around 1995 to 2007, so parents of millennials used them to film birthday parties and soccer games.