CAIRO, Nov 22 (Reuters) - Egyptian President Mohamed Mursi on Thursday sacked Abdel Maguid Mahmoud, the general prosecutor, to try to appease protesters demanding the retrial of officials they say were involved in orchestrating violence against them during last year's uprising.

Mursi tried to remove Abdel Maguid Mahmoud in October to calm protesters furious about the acquittal of a number of senior state officials who had stood trial over the issue but was forced to keep him in place after judges protested.

Talat Abdullah was appointed the new general prosecutor. "The public prosecutor general will occupy his post for a period of four years," said Yasser Ali, a presidential spokesman.

"The public general prosecutor is to be appointed from among members of the judiciary authority by the president for a period of four years," said Yasser Ali in a statement aired live on state TV.

Ali said the new decree applies immediately, thereby forcing the current prosecutor from his post. Mahmoud had been public prosecutor for many years.