I have 1000s of negatives of my first 2 children that I would like to turn into digital prints in order to save them onto my external hard drive for back up purposes. I am not computer savvy at all so please answer in as easy to understand lingo as possible. I don't want to spend $1000s on it but do want something with a decent quality. Can you please recommend a good scanner for me? And it has to work on a Mac as I don't own a PC. Thank you in advance for your help!