State-rescued Royal Bank of Scotland on Friday said it had appointed New Zealander Ross McEwan, its head of retail, to be the new chief executive, as the lender also announced a return to profit. RBS, 81-percent owned by the British taxpayer, said in a statement that McEwan would take on his new role from October, replacing Stephen Hester who recently announced he would be stepping down ahead of the bank\'s return to the private sector.