Not the 1977 Apple II, but the 1984 Macintosh. Adams owned a variety of computers from the obscure DEC Rainbow, to the also-obscure Apricot, to the BBC Micro, but as far as I know he never owned an Apple II, but he was a fan of the Macintosh from the first time he saw it and even wrote in the "about the author" section of his books that he "lived with a lady barrister and an Apple Macintosh".