TMZ said the move came after Myers tweeted: "I'm going to murder Ellen Page. She's dead."
The Los Angeles Police Department conducted an investigation into the online threat and concluded it was Myers who made it.
The 25-year-old Canadian actress was present for Wednesday's hearing, during which Myers was ordered to have no contact with her for three years, TMZ said.
Page is best known for her films "Juno" and "Inception."