1920 - 41 Wikipedia's account is brisk and unsurprising: " She was requisitioned for use as a troopship in the Second World War, surviving a torpedo attack. In 1953 she was requisitioned by the Ministry of Troop Transport (MoTT) and renamed Empire Clyde. She was scrapped in 1957."

That about covers it. Whoever wrote this entry made the ship sound somewhat cursed:

In October 1925, Cameronia rescued the crew of a United States Coast Guard cutter that had caught fire. She was in collision with the Norwegian steamship Hauk the following month. Her steering gear failed on a voyage in January 1926 and she returned to Glasgow for repairs. In August 1926, a collision with Cunard's Samaria was avoided by 6 feet.  Cameronia underwent a refit in 1928 to correct her tendency to pitch heavily. 

If you're inclined to care: "The Cameronia is mentioned in the fourth season of the British television drama Downton Abbey, when a central character, Robert, Earl of Grantham, books passage on the ship on a last-minute trip to New York to visit his brother-in-law, Harold Levinson."