If you see the same thing on both displays, you should start by making sure the displays are Extended instead of Mirroring ...

Many MacBook Airs only allow you to connect one external monitor. Here is how to connect two or more displays to boost your productivity even more.

How Many Monitors Can You Add? Most computers can run dual monitors. But if you want to add a third screen or use two 4K monitors, check that your device is capable first.

The new MacBook Air with M3 processor supports two external monitors — when the lid is closed. Here's what to expect when using Clamshell mode.

For example, four full HD monitors, two monitors with 2560×1600 pixels (WQXGA), or one UHD screen are possible with DisplayPort 1.2. Monitors with different resolutions can be mixed.

For the purposes of this guide, we'll be assuming your monitor has at least one HDMI port, but otherwise, the advice herein should be fairly universal. So, here's how to use a computer monitor as ...

I'm working on a PC with two PCI graphics cards. One Nvidia GeForce MX 4000 and one ATI All-in-wonder 128. I'm attempting to use two monitors (one with each card) but have gotten nowhere.

Many MacBook Airs only allow you to connect one external monitor. Here is how to connect two or more displays to boost your productivity even more.

If I don't want to use a dock to connect three monitors, I have to upgrade to an M3 Max MacBook Pro, which will cost me at least $3,499. So, instead of spending an extra $2,300 (or more) to get ...