Complex sentence: In 1941 MacMurray purchased land in the Russian River Valley in Northern California and established MacMurray Ranch where he spent his time when not making films and engaged in raising prize-winning Aberdeen Angus cattle.
Split into simpler sentences: In 1941 MacMurray purchased land in the Russian River Valley in Northern California and established MacMurray Ranch. He spent time there when not making films, engaging in, among other things, the raising of prize-winning Aberdeen Angus cattle.