Apple Powerbook G3 in Sex and the City - Season 4, Episode 8, "My Motherboard, My Self" (2001)
Carrie has a Powerbook G3 on which all her work is stored. The machine crashes and in desperation she takes it to a computer repair shop in the hope of getting her files back.
This is one of my favorite episodes. I can completely understand the panic and frustration Carrie Bradshaw (Sarah Jessicia Parker) when her computer crash, i.e., motherboard, etc.