I have Mac OS 10.4.10 running on my 350mhz Blue and White G3 with 384mb ram (revB), but it's very slow (duh). I have no use for Dashboard or Spotlight on my G3, and I only use 10.4 for Classic, and maybe light word-processing. Would a copy of Panther (10.3), or 1gb ram upgrade be better (about same price IIRC)? lol I do have Jaguar (10.2), not being used, along with 10.4 which is installed on the G3. Also, about security, the G3 does not go online any way..