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I bought a new Samsung monitor LC27JG54QQEXXY with the spec of 2560x1440, 144HZ.
I connect with my iMac 27" Late 2013 macOS Sierra, but after connected with thunderbolt converter to HTMI, my Samsung monitor only showing maximum resolution of 1920x1080.
I tried connect with my another newer iMac with macOS Mojave, with same converter and cable, the monitor work completely fine in 2560x1440.
What is the problem?
iMac 27", macOS 10.12
God ****! FINALLY I have the solution!
Using 'Mini DisplayPort to DisplayPort' it solved the problem! My iMac Late 2013 work with my Samsung Monitor in 2560x1440.
Wooho!! Hope this help those have the same problem.
Apple should have indicate which cable to use in the product spec instead, not letting customer to figure out!
Use this cable guys
God ****! FINALLY I have the solution!
Using 'Mini DisplayPort to DisplayPort' it solved the problem! My iMac Late 2013 work with my Samsung Monitor in 2560x1440.
Wooho!! Hope this help those have the same problem.
Apple should have indicate which cable to use in the product spec instead, not letting customer to figure out!
Use this cable guys
I saw someone have solved the issue by using Mini DisplayPort to DisplayPort Cable
https://discussions.apple.com/thread/6739773?answerId=28058629022#28058629022
I gonna to try this out, hope it work, it seem like this is the only hope.
I came across an article, it said my iMac late 2013 is support external monitor up to 2560x1600 only by 'Mini DisplayPort to dual-link DVI'.
I double check on my both iMac late 2013 (which do not work with my monitor) and iMac late 2015 (work completely fine with my monitor) spec, the different between Mini DisplayPort is one do not mentioned HDMI but another do.
iMac Late 2013
iMac Late 2015
Is that possible because my iMac Late 2013 do not support DisplayPort to HDMI?
Try using the displays DisplayPort with a Mini DisplayPort to DisplayPort Cable from a Thunderbolt port.
So far I cannot try yet because i dont have DisplayPort cable right now.
Is that possible because of OS Sierra is not compatible with 2k display? or because of my Thunderbolt 1 not support 2k display?
What do you think?
2nd Display Support:Dual/Mirroring*2nd Max. Resolution:2560x1600 (x2)
Details:This model can simultaneously support two external displays up to 2560x1600 via Thunderbolt.
Was that the only Option in Displays?
How about if you hold alt key when clicking Scaled in Displays pref pane?
I tried on holding alt key when clicked scaled, it show additional options, but the highest is still 1920x1080 on my old iMac (Late 2013).
Do you mean try not to use HDMI?
Use Mini Display Port to Display Port instead
HDMI can behave strangely for resolutions greater than 1920 X 1080. The DisplayPort input may be better.
Do let us know please. :)
Great to hear, thanks for the report! :)
External Monitor didn't show correct resolution
