This functionality allows certain iMac models to be used as external displays for another Mac. Connecting the two computers with a compatible cable transforms the receiving iMac into a monitor, mirroring or extending the primary Mac’s desktop. For instance, a MacBook Pro could utilize an iMac’s larger screen for enhanced visuals or multitasking.
Utilizing an iMac’s high-resolution display offers significant advantages for creative professionals, software developers, and anyone seeking additional screen real estate. Historically introduced to provide a cost-effective alternative to purchasing a dedicated monitor, this feature simplifies workflows and maximizes productivity. However, compatibility is limited to specific iMac models and operating system versions, with newer Macs no longer supporting this capability.