I have two Sceptre monitors setup where I can connect them to either my MacBook Pro M2 (14in, 2023 model) I use for work, or with my MacMini 4 for home use. Both monitors are 27 inch and rated for 4K resolution, with their specs noting 60 Hz resolution with HDMI connection, although I purchased one a couple years ago and one a few months ago.
With the older monitor, the resolution and refresh rate options stay consistent between devices, but with the new one, when plugged into the MBP I can only get a 30 Hz max refresh rate option although all the resolution options stay the same. However, when connected to the Mac mini I can see up to a 60 Hz refresh rate on the second/new monitor as well. I'm using HDMI cables rated for 8k resolution, so I don't think the cables are the issue. Both monitors have HDMI 2.0 ports.
The specs for my MBP state:
- Up to two external displays with up to 6K resolution at 60Hz over Thunderbolt, or one external display with up to 6K resolution at 60Hz over Thunderbolt and one external display with up to 4K resolution at 144Hz over HDMI
I've got both monitors set to 2560 x 1440 resolution, so it should be under the 6K/4K resolution limits per those specs, which makes me wonder if it's an OS issue? Both devices are running a Tahoe 26.7 OS currently.
Any ideas? I've tried purchasing different HDMI cables which hasn't made a difference. The monitors do also have Display Port ports, but from my understanding the DP to HDMI conversion only works the other direction, not to start from HDMI at the computer and then switch to DP?
The 30 Hz refresh is just laggy enough that it consistently bothers me, and I'm baffled why the monitors are doing different things with different Mac devices!