The 32-year-old country singer was released Sunday morning, said a clerk at the Williamson County jail.
The violation occurred in July when McCready was accused of scuffling with her mother and resisting arrest at her mother's home in Fort Myers, Fla.
She still must serve two years' probation.
Her attorney, Lee Ofman, said McCready has learned her lesson and will stay out of trouble.
She had a No. 1 single in 1996 with "Guys Do It All the Time."
