The Toffees forward will complete a season-long loan to La Liga on Thursday, having failed to fight his way into Marco Silva's Premier League plans
Real Sociedad are set to sign Spanish striker Sandro Ramirez on loan from Everton.
The 23-year-old has failed to break into the starting XI at Goodison Park, playing just eight Premier League games since joining the Toffees from Malaga for £5.2 million ($6.8m) in July 2017.
He was loaned out to Sevilla for the second half of the 2017-18 season and is now set to return to La Liga for a season-long stay at Sociedad.