You want Mac OS 9 or earlier. :-) Well, maybe not quite. You could attach text comments to a file, but I can't remember if the comments were searchable. And before OS 8 or so, the comments disappeared whenever you decided to "rebuild the Desktop." You could assign a searchable, color-coded category to a file, but you were limited to one category per file and something like six or eight categories altogether. Still, though, the earlier Mac OSs were very handy (except for the crashing...)
