Failed to verify the preflight file. It is not signed by Apple.
Had no problems downloading and installing Maverick. But now when I try to update any Apps I get this error:
Failed to verify the preflight file. It is not signed by Apple.
Even if I try to download any FREE APP I get this error.
Anyone know what is causing this error?
Stu
OS X Mavericks (10.9), iPhone 4S