List of Macs Compatible With macOS Big Sur - MacRumors
How to Install/Upgrade the PCIe SSD in a 27-inch iMac (Late 2013) iMac14,2 - YouTube
macOS 10.16 system requirements: Can your Mac run macOS Big Sur?
Identify your iMac model - Apple Support
macOS 11.0 'Big Sur' will natively support all Macs from mid-2013 to current, dropping support for all pre-Retina MacBook Pros and the first gen Retinas. : r/mac
MacOS Big Sur Compatibility & Supported Macs List | OSXDaily
macbook pro - macOS 11.0 Big Sur compatibility with Mac Book Pro 2013 - Ask Different