Further recommendation for base model MacBook Pro. Lightroom is excellent to use and there are many useful YouTube tutorials to help you and Steve’s comprehensive Lightroom video based teaching course. The latest version of LR has excellent masking options and its library organisation is very easy to use. D500 files are not big by today’s standards either @Bazzaton2712 and in any case additional external storage is cheap these days if you should need it. Larger HD storage on the Mac would be faster but much more expensive.