Samsung smart monitor M7 usbc issue

Hello P.Potoczky,

Welcome to Apple Support Communities!

If we understand your post correctly, you're having an issue when you unplug the USBC cable from the Samsung monitor it makes weird sounds. We'd like to help!

For issues with external displays, check out these steps which may help:

Find out how many displays you can connect

You can connect one or more external displays depending on your Mac model. To find out how many external displays your Mac supports, check its technical specifications page: 

1. Choose Apple menu  > About This Mac, double-click your serial number, then press Command-C to copy it.

2. Go to the Tech Specs page, click the Search Tech Specs bar, press Command-V to enter your computer's serial number, then click Search.

3. Click the specs page for your Mac. The number of displays your Mac supports appears under Video Support or Graphics.

Mac computers with Apple silicon

On Mac computers with Apple silicon, you can connect up to 5 displays depending on the chip in your Mac. To find out which chip your Mac has, choose Apple menu  > About This Mac. 

If you're using a Mac Studio with M1 Ultra:

• You can connect up to five external displays to your Mac using the Thunderbolt 4 (USB-C) and HDMI ports on the front and back of the computer.

If you're using a Mac with M1 Max:

• On MacBook Pro, you can connect up to four external displays to your Mac using the Thunderbolt 4 (USB-C) and HDMI ports.

• On Mac Studio, you can connect up to five external displays to your Mac using the Thunderbolt 4 (USB-C) and HDMI ports on the back of the computer.

If you're using a Mac with M1 Pro:

• You can connect up to two external displays to your Mac using the Thunderbolt 4 (USB-C) and HDMI ports.

If you're using a Mac with the M1 or M2 chip:

• On MacBook Air, 13-inch MacBook Pro, iMac, and Mac mini, you can connect one external display using either of the Thunderbolt / USB 4 ports. On iMac, connect your display to either of the ports with the Thunderbolt symbol .

• On Mac mini, you can connect a second display to the HDMI port.

• Using docks or daisy-chaining devices doesn't increase the number of displays you can connect.

Connect your display

Connect your display to power, then connect your display to your Mac. Check the ports on your Mac to find out whether you need an adapter. If you're using a USB-C or Thunderbolt adapter to connect your display, the adapter must be compliant with DisplayPort Alt Mode, Thunderbolt 3, or Thunderbolt 4.

If you use an external keyboard and mouse with your Mac notebook, you can close the built-in display after you connect your external display. You might have to press a key or click your mouse to wake the external display. To use your Mac with the display closed, you need to connect your power adapter or connect an external display that also charges your Mac, such as the Apple Studio Display or 23.7-inch LG UltraFine 4K Display.

If your external display doesn't turn on after you connect it to your Mac, connect your display while your Mac is off, then wake or turn on your Mac.

Use AirPlay

If you have an Apple TV or an AirPlay 2–enabled smart TV, you can use your TV as a separate display for your Mac. Learn how to use AirPlay to mirror or extend your Mac display.

Learn more

Learn what to do if your external display isn't detected or appears blurry when connected to your Mac.

Connect a display to your Mac

Let's check the adapters. Check out this article: Adapters for the Thunderbolt 4, Thunderbolt 3, or USB-C port on your Mac

Now let's check out the ports on your Mac: Identify the ports on your Mac

Let us know if you have any questions.

Thank you for using Apple Support Communities.

Take care!