Here are the devices that can run iOS 15, iPadOS 15, macOS Monterey, and watchOS 8 :

Apple have just announced and previewed iOS 15, iPadOS 15, macOS Monterey, and watchOS 8 at the (once again) streamed WWDC 2021. If you are a developer your beta downloads have already gone live and the public beta period begins in July. The big question is, ‘is your hardware compatible?’ Apple usually removes support for a few devices each year as the software evolves, check below to see if your iPhone, iPad, Mac or Apple Watch had made cut.

Supported devices for iOS 15:
- iPhone 12, iPhone 12 Mini, iPhone 12 Pro, iPhone 12 Pro Max
- iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max
- iPhone XS, iPhone XS Max
- iPhone X, iPhone XR
- iPhone 8, iPhone 8 Plus
- iPhone 7, iPhone 7 Plus
- iPhone 6S, iPhone 6S Plus
- iPhone SE (first and second generation)
- iPod Touch (seventh generation)
The good news from this update is that if your device supports iOS 14, it will support iOS 15.

Supported devices for iPadOS 15:
- iPad Pro 12.9-inch (first through fifth generation)
- iPad Pro 11-inch (first through third generation)
- iPad Pro 10.5-inch
- iPad Pro 9.7-inch
- iPad (fifth through eighth generation)
- iPad Mini (fourth and fifth generation)
- iPad Air (second through fourth generation)
Again your your iPad runs iOS 14 it will also run iOS15.

Supported devices for macOS Monterey:
- iMac (late 2015 and later)
- iMac Pro (2017 and later)
- Mac Pro (late 2013 and later)
- Mac Mini (late 2014 and later)
- MacBook Pro (early 2015 and later)
- MacBook Air (early 2015 and later)
- MacBook (early 2016 and later)
A number of models that got the Big Sur update last year have been left out in terms of support for the new software, including the 2015 MacBook, the 2013 MacBook Air, the late 2013 MacBook Pro, and the 2014 iMac.

Supported devices for watchOS 8 :
- Apple Watch Series 3
- Apple Watch Series 4
- Apple Watch Series 5
- Apple Watch Series 6
- Apple Watch SE
If your Apple Watch ran watchOS 7 it is good news again as it will also support watchOS 8.
If you would like to learn more about the 2021 OS releases you can find detailed previews on the Apple Site :
iOS 15 : https://www.apple.com/ios/ios-15-preview/
iPadOS 15 : https://www.apple.com/ipados/ipados-preview/
macOS Monterey : https://www.apple.com/macos/monterey-preview/
watchOS 8 : https://www.apple.com/watchos/watchos-preview/



