I used to connect my MBP 2018 to the monitor LG 27UL850-W. In my old setup, I connected this usb-c port of the monitor to my MBP's usb-c port:

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This connected both the audio/video signal and the power with just one cable! Very cool.

Now, with my MBP 16 2023, this can't be done anymore. So, I connect the monitor's usb-c to the MBP's mag safe 3 (just for the power supply) and I use a separate HDMI cable for the audio/video signal.

Although it seems working, I'm wondering if this setup is safe or if I'd better use the power adapter bundled with the MBP 16 2023 (I do not now if I'm going to miss or break something without it).

  • 2
    I read the specs for the Mac and monitor. I do not understand why you can not use a single cable like you did with the other Mac. The instructions for charging the Mac state the USB-C ports can be used to charge the Mac. Apr 3 at 10:55
  • Yes, I tried with the right cable, an all can work in the old way. However, as per the monitor spec, the TB3/ USB-C PD delivers 60W. The bundled power adapter (Mac) delivers 140W. Not sure if it can be a problem as time goes by Apr 3 at 12:48
  • 1
    This question is closely related to your question: Does using a lower power adapter to prevent fast charging (MBP M1) help preserve the battery? Apr 4 at 1:44
  • 1
    The best setup in your case would be to charge the Mac by connecting the 140W Power Adaptor that came with the Mac to the MagSafe 3 port. You can still use the USB-C port for the monitor. In this case, I would assume the Mac is not getting any power through the USB-C port. Apr 4 at 21:08
  • 1
    Note that both 67W and 96W USB-C Power Adapters from Apple are not shown to be compatible with your Mac. So most likely the 60W that the monitor can provide would not be enough to charge the Mac while in use. The 140W USB-C Power Adaptor is shown to be compatible with your Mac. Apr 4 at 21:08


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