Hi, can pls someone try the new macbooks with LG TV (with 120 hz function) as external displays? I saw one review on you tube and with M1 macbook pro it feel laggy...( when connected to windows pc it was fine and smooth) What about new one?
Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
new 14/16 inch macbooks and LG OLED TV 120HZ
- Thread starter Delarock
- Start date
- Sort by reaction score
Do you specifically want 4k120, or the lesser resolutions?
I have a LG CX 55" and tried directly plugging the base 14" to it with a HDMI 2.1 cable. Though of course only 2.0 is negotiated, system pref - display only let me push 120Hz under 1080 (I don't think I saw 1440 but I may have missed it). Did some 120Hz test with testufo.com via Chrome with the 14" internal display mirroring the same, they seem to response pretty similarly to 120Hz movements unless there is variable refresh rate / sync going on.
I think it takes a DP to HDMI 2.1 adaptor to achieve 4k120Hz out of M1 Macs?
I have a LG CX 55" and tried directly plugging the base 14" to it with a HDMI 2.1 cable. Though of course only 2.0 is negotiated, system pref - display only let me push 120Hz under 1080 (I don't think I saw 1440 but I may have missed it). Did some 120Hz test with testufo.com via Chrome with the 14" internal display mirroring the same, they seem to response pretty similarly to 120Hz movements unless there is variable refresh rate / sync going on.
I think it takes a DP to HDMI 2.1 adaptor to achieve 4k120Hz out of M1 Macs?
thnak you for the test, yes i would like to see performance of 4k/ 120 hz because i want it as my external display( when 42 oled finally release). I found this adapter : https://www.amazon.com/Cable-Matters-48Gbps-Adapter-Supporting/dp/B08MSWMXT4
4k 120 hz ready, but there is restriction for mac, only 4k/60 hz supported. dont understand why.
4k 120 hz ready, but there is restriction for mac, only 4k/60 hz supported. dont understand why.
As an Amazon Associate we earn from qualifying purchases.
(Correction: I see you're asking why the adaptor doesn't work. It SHOULD work. As far as I know macOS does support 4K120 if you have the hardware for it, although I haven't tested it myself as I'm too cheap to buy then necessary adaptor.. If I happen to try HDMI 2.1 with my MBA/MBP/Hackintosh and C9 I'll try and update this thread... might be a while though.)
It's really simple. HDMI 2.0 only has enough bandwidth (18 Gbps) to do 4K60. For 4K120 you need HDMI 2.1 (up to
48Gbps). For some reason, Apple decided to be cheap and gave their brand new Macbook Pro's an HDMI 2.0 port instead of a 2.1 port. Is it disappointing? Yes. Thankfully, you can get around this limitation and get full 4K120 with an HDMI 2.1 adaptor or cable for the ThunderBolt 4/USB4 ports.
As an Amazon Associate we earn from qualifying purchases.
What do you mean by choppy? Do you have a link to the video? Was it a MacBook Air? MacBook Pro (so M1 Pro/Max?)
What are they doing on the display and do they have any other displays connected via DisplayLink? Can you see if the refresh rate is actually 120? I know my MBA has improperly connected to my C9 before and only given me 30Hz (?) instead of 60, but this can usually be fixed with a quick disconnect and reconnect.
I just plugged my M1 Max to an LG C1 OLED display using this cable:
The cable is supposedly able to drive 4K @ 120 Hz however it's listing it here as 60 Hertz refresh rate only inside the macOS settings.
USB C to HDMI Cable 6.6ft (8K@30Hz), Type C(Thunderbolt 3/4) to HDMI Cord 4K 120HZ, 48Gbps Compatible with MacBook Pro 2020/2019, MacBook Air/iPad Pro 2020, Surface Book 2 and More (2M)
8K USB C to HDMI Cable Upgrade to HDMI 2.1 or future-proof your setup with the USB C to HDMI 2.1 cable.This Cable transmission speed up to 48Gbps, resolution up to 7680x4320, refresh rate up to 8K@30Hz,4K@120Hz, 2K@165Hz. supports HBR3,3D video, Dynamic HDR and HDCP 2.2. Outstanding Watching and ...
www.amazon.ca
The cable is supposedly able to drive 4K @ 120 Hz however it's listing it here as 60 Hertz refresh rate only inside the macOS settings.
As an Amazon Associate we earn from qualifying purchases.
And the 60hz is only at 422 or non HDR, so useless for use as a monitor with macOS. Apple needs to get this corrected ASAP as the 40gbs Thunderbolt ports can easily handle the bandwidth necessary for 4k HDR 120 444I just plugged my M1 Max to an LG C1 OLED display using this cable:
USB C to HDMI Cable 6.6ft (8K@30Hz), Type C(Thunderbolt 3/4) to HDMI Cord 4K 120HZ, 48Gbps Compatible with MacBook Pro 2020/2019, MacBook Air/iPad Pro 2020, Surface Book 2 and More (2M)
8K USB C to HDMI Cable Upgrade to HDMI 2.1 or future-proof your setup with the USB C to HDMI 2.1 cable.This Cable transmission speed up to 48Gbps, resolution up to 7680x4320, refresh rate up to 8K@30Hz,4K@120Hz, 2K@165Hz. supports HBR3,3D video, Dynamic HDR and HDCP 2.2. Outstanding Watching and ...www.amazon.ca
The cable is supposedly able to drive 4K @ 120 Hz however it's listing it here as 60 Hertz refresh rate only inside the macOS settings.
As an Amazon Associate we earn from qualifying purchases.
Here is a good thread where we exhaust efforts trying to get HDMI 2.1 working. Unfortunately macOS is currently limiting any hdmi connection to 600mhz clock speed. We know it's not a hardware limitation also because older Intel machines with bootcamp can utilize the 2.1 adapters at full capacity.
forums.macrumors.com
Regarding the chroma mention above, if you set your LG OLED to PC mode in input settings, it'll output 4:4:4.
Mac mini: 4k @ 120hz?
Any thoughts on using something like this to emulate a Displayport device, forcing the Mac to output a full signal then adding on a DP to HDMI 2.1 Active Adapter on the output? https://www.ute.de/produkte/videotechnik/edid-emulatoren/nti-dp-hp-mntr-src.html
forums.macrumors.com
Regarding the chroma mention above, if you set your LG OLED to PC mode in input settings, it'll output 4:4:4.
This is good stuff thanks! PC mode will get 444 at 60hz, but not HDR. The choice has always been either 4k HDR 60hz 422 or no HDR to get to 444. I hope you know different thoughHere is a good thread where we exhaust efforts trying to get HDMI 2.1 working. Unfortunately macOS is currently limiting any hdmi connection to 600mhz clock speed. We know it's not a hardware limitation also because older Intel machines with bootcamp can utilize the 2.1 adapters at full capacity.
Mac mini: 4k @ 120hz?
Any thoughts on using something like this to emulate a Displayport device, forcing the Mac to output a full signal then adding on a DP to HDMI 2.1 Active Adapter on the output? https://www.ute.de/produkte/videotechnik/edid-emulatoren/nti-dp-hp-mntr-src.html
Regarding the chroma mention above, if you set your LG OLED to PC mode in input settings, it'll output 4:4:4.
