Apple Updates Platform Security Guide to Highlight Changes Coming With M1 Chip Apple’s updated Platform Security Guide covers iOS 14.3, iPadOS 14.3, macOS Big Sur 11.1, tvOS 14.3, and watchOS 7.2. By Jagmeet Singh | Updated: 19 February 2021 01:30 IST Photo Credit: Reuters Highlights The update mainly highlights changes coming with Apple M1 chip Apple also highlights iOS 14 and iPadOS 14 security updates Apple today updated its Platform Security Guide to highlight the key security changes it has implemented on its products, including the iPhone, iPad, and the Mac. The updated document is the biggest ever — nearly a 200-page comprehensive technical guide — detailing the features Apple uses to protect user devices and data across all platforms. One of the changes that the latest revision brings to Apple's Platform Security Guide is the addition of all the major security changes available through Apple M1 chip that was introduced last year.