Apple has formally appealed the court ruling that the FBI obtained in February, which would force it to decrypt the iPhone at the heart of a terrorism investigation via a signed operating system update. Apple appears to have the support of a federal judge, who has ruled that the law the FBI is citing is not applicable. Whether the written ruling helps Apple win its appeal remains to be seen, but the vendor has appealed to a higher court and asked the original judge to vacate her ruling. Syed Farook and his wife Tashfeen Malik killed 14 people and wounded 22 in a mass shooting on December 2 2015. There has been no concrete link to an external terrorist organization…