I have a scanner from a company called Plustek that worked pretty well to do that for me. Has a frame to put mounted slides and another to hold a strip of color negatives for scanning, plus some despeckling routines that clean up the image for you. The company website is
https://plustek.com/us/ and you can get them on Amazon. They are not cheap, but consider what you are asking for in a slide scanner. You want a very small image (essentially 1 inch by 1.4 inches) to be scanned at sufficient resolution that when you blow that image up to an 8 x10 or larger, or crop out the extraneous stuff and blow the rest up even more, the image stays sharp. That means scanning at a very high dots per inch (dpi). I use 7200 dpi, but the more modern models now go higher. Typical flat bed scanners barely reach 2400 dpi and some can't get past 600 dpi, which is fine for scanning or duplicating a printed sheet but which won't give you the resolution of the details of the slides/negatives you are going to want. And if you have negatives from color film, the colors need to be converted from negative to positive, which is not just inversion but applying the conversion that the chemical process of the development fr that particular kind of film does. The software for Plustek does all of that. The current version of the software does support Catalina, I'm running that now.
So it's up to you, go cheap and limit the usability of the results, or do it properly (yes, that is more expensive-about $500) and have useful images.