A:Answer You can use Image Capture to scan, but note that if you save to a jpg file the compression is set in a way that produces pretty bad results (very small files).
When I scan I save to TIFF, then do my touchup in GIMP, and finally save to jpg with a high-quality setting and the results are great. For photos 600 dpi looks really good, though the scanner can go up to 1200.
Tip: I was having problems with the scanner and my mac until I read someone posting to turn off IPV6. Once I switched to to use only IPV4, it started working great. This is likely a mac problem of some kind.