Once a software update is installed, which the device might automatically perform, there would be no going back to earlier versions. This policy would be of high relevance with Apple releasing its iPhone 16 on September 20.

Apple has issued new, significant security updates for iOS, macOS, tvOS, visionOS, and watchOS before its release, all with fixes for several security bugs affecting users.

Apple never comments, discusses, or reports about specific security problems until proper research along with patches or updates has been released. Keeping that in mind, the UAE Cyber Security Council also suggested users of the devices update their devices with the latest security updates offered by Apple.

Keeping the software updated will patch security vulnerabilities, keeping your Apple devices from being at risk. Updates can't be undone; that means after installing software updates on iOS, iPadOS, tvOS, watchOS, or visionOS, you can't restore an earlier version of iOS.

Here's what's available now, per each product:

iOS and iPadOS: Available today are iOS 18 and iPadOS 18. Update your iPhone, iPad, or iPod touch:.
macOS: The newest version is macOS 15. One should update the Mac computers and also make sure to permit the important background updates.
tvOS: The newest version is tvOS 18. Instructions on how to update your Apple TV are here.
watchOS: The latest version is watchOS 11. Users can follow the steps to update their Apple Watches.
visionOS: The latest for Apple Vision Pro is version 2. Instructions on how to do the update are available.
And here's what it says device-specific, as far as supported updates go: iOS 18/iPadOS 18: Compatible with iPhone XS or later, iPad Pro (13-inch, 12.9-inch 3rd generation and later, 11-inch 1st generation and later), iPad Air 3rd generation and newer, iPad 7th generation and newer, and iPad mini 5th generation and newer. watchOS 11: Available for the Apple Watch Series 6 and later models. Safari 18: Available with macOS Ventura and macOS Sonoma.
tvOS 18: Apple TV HD and Apple TV 4K models.
macOS Sequoia 15: Mac Studio (2022 and later), iMac (2019 and later), Mac Pro (2019 and later), Mac Mini (2018 and later), MacBook Air (2020 and later), MacBook Pro (2018 and later), iMac Pro (2017 and later).
iOS 17.7 and iPadOS 17.7: iPhone XS and later models; iPad Pro 13-inch; iPad Pro 12.9-inch 2nd generation and later; iPad Pro 10.5-inch; iPad Pro 11-inch 1st generation and later; iPad Air 3rd generation and later; iPad 6th generation and later; iPad mini 5th generation and later.
visionOS 2: Apple Vision Pro.

Keeping your device running the latest software ensures you of security and performance. At the same time, a downgrade after an update is not supported.