We here at HotHardware regularly advise our readers to ensure that their systems and software are up to date. Updates may include cool new features, but most updates are security-driven, patching holes, fixing glitches, and preventing exploits. However, for Apple, apparently not all systems are created equal, for not all devices will get complete

Source: Hot Hardware – Apple Admits It Only Fully Patches Security Flaws In Its Latest OS Releases