Samsung Odyssey G9 on a Mac: resolution, scaling and window layouts
By Guido Crego · Last updated:
The Odyssey G9 works with any Apple silicon Mac, with two catches: it needs a USB-C-to-DisplayPort cable, because no 49-inch G9 takes video over USB-C, and at its native 5120 × 1440 macOS runs it at 1×, without Retina scaling. Text ends up the size it is on a 27-inch 1440p screen.
| Size | 49" |
| Resolution | 5120 × 1440 (32:9) |
| Column widths at 5120 × 1440 | ½ 2560 · ⅓ 1707 · ¼ 1280 |
| Column widths at 3840 × 1080 | ½ 1920 · ⅓ 1280 · ¼ 960 |
This page covers every 49-inch G9 (5120 × 1440, 32:9): the original C49G95T, the Neo G9 G95NA, the G95C, the OLED G95SC and G93SC, the OLED G95SD, G93SD and G91SD, and the G91F. The 57-inch Neo G9 is a different screen (7680 × 2160) with its own page. Everything here was checked on October 8, 2026; reports from owners say so and link to the thread.
The cable: DisplayPort, not USB-C
None of the 49-inch G9s carries video or charging over USB-C. The OLED G95SC’s USB-C ports “cannot support power delivery or DisplayPort Alt mode, they are purely data ports” (TFTCentral), and the G91SD’s USB-C upstream is data only (Samsung). So you plug in a USB-C-to-DisplayPort cable (or HDMI, on a Mac that has it), and the Mac keeps its own charger.
Samsung’s own advice for MacBooks is a real USB-C-to-DisplayPort cable rather than an adapter, and if an adapter shows no picture, setting the monitor’s DisplayPort version to 1.2 or 1.1 (Samsung support). A picture that looks stretched usually comes from a USB-C-to-HDMI adapter; owners fix it with a USB-C-to-DisplayPort 1.4 cable (Samsung community).
What refresh rate a Mac gets
Apple doesn’t publish numbers for this monitor, so this is what owners report at 5120 × 1440:
| Mac | Reported | Source |
|---|---|---|
| MacBook Pro M2 Max, M3 Max | 240 Hz over USB-C-to-DisplayPort | Apple Community, 2023 · BetterDisplay, 2024 |
| Mac mini with the OLED G9 | 240 Hz | Apple Community, 2025 |
| MacBook Pro M2, M3 Pro | 120 Hz (the M3 Pro once plugged in directly, not through a dock) | Apple Community, 2023 · 2024 |
| MacBook Air M4 | 144 Hz on a 49-inch Samsung | Reddit, 2025 |
For 240 Hz, the monitor has to allow it: Samsung ties it to Game Mode, and owners turn it on in the monitor’s game settings. If the picture flickers, Apple’s fix for variable refresh is turning Adaptive Sync off (Apple).
Why it doesn’t look like Retina
macOS’s sharp “looks like” modes draw everything at twice the size and scale it down. Looking like 5120 × 1440 would need a 10240-pixel-wide image, and no Mac makes one (BetterDisplay wiki). So at native resolution the G9 runs at 1×. At about 109 pixels per inch, text is the same physical size as on a 27-inch 1440p monitor: not crisp like a MacBook screen, but not small either.
The sharp modes top out lower, and they make everything bigger:
- “Looks like 3840 × 1080” on M1, M2 and M3 Pro and Max chips (BetterDisplay).
- 3072 wide on the base M1, M2 and M3 (BetterDisplay wiki).
- About 3360 wide on M4 and M5 chips (one M4 Max owner, 2025).
Most owners stay at native 1×. Others use BetterDisplay to add custom or virtual HiDPI modes (on a base M1 Air, one user found it made “every interaction feel slow”), or split the monitor with picture-by-picture into two 2560 × 1440 inputs, which takes two cables and a Mac that drives two displays.
Common problems
- 5120 × 1440 isn’t in the list. In System Settings → Displays → Advanced, turn on “Show resolutions as list” and then “Show all resolutions” (Apple). If it’s still missing, owners fixed it by setting the monitor to 120 Hz or switching its DisplayPort setting from 1.1 to 1.4 (Apple Community).
- The Mac doesn’t see the monitor. Unplug the monitor’s power for 30 seconds or more (Apple Community).
- An OLED G95SC shows up as 1920 × 1080. Set 5120 × 1440 as the native resolution in BetterDisplay (BetterDisplay).
- The monitor stays on after the Mac sleeps. The G95SC, with its smart-TV features, takes about a minute to follow (TFTCentral).
Splitting 5120 × 1440 into windows
macOS tiles windows into halves and quarters only (Apple), and half of this screen is 2560 points: a whole 27-inch 1440p monitor for one window. Columns work better. The table at the top has the widths; in practice:
- Four columns give each window 1280 points, about the width of a small laptop screen: enough for code, a chat, a spreadsheet or a browser.
- A wide center with narrow sides (25 / 50 / 25 means 1280 / 2560 / 1280) puts the window you work in straight in front of you, so you don’t turn your head to the edges.
- A chat, a wide center, a preview and a stacked column, the layout in the demo above: the right column holds two small windows, like a terminal over notes.
- Two halves split down the middle, if you think of it as two monitors without the bezel.
At “looks like 3840 × 1080”, the same layouts give 960 points per column in four, or 960 / 1920 / 960. For other ultrawides and for thirds, see ultrawide monitors on a Mac.
Set it up with Shoji
Shoji · window zones for Mac lets you draw these layouts and snap windows into them.
- Open Shoji and allow Accessibility when macOS asks. Any app needs it to move other apps’ windows.
- From the Shoji menu in the menu bar, choose Edit Zones and pick the G9.
- Start from Thirds or Center + sides, or drag on the screen to draw your own zones. They snap to a 12 × 8 grid, so four columns land on 3 / 3 / 3 / 3 twelfths and a wide center on 3 / 6 / 3.
- Save. Hold fn while you drag a window: the zones light up. Let go over one and the window fills it.
The G9 keeps its own layouts. If it sits next to a MacBook, the laptop screen has its own zones, and when you unplug the G9 its layouts wait for it until you plug it in again.
Questions
Does the Odyssey G9 work with a MacBook Air?
Yes, through a USB-C-to-DisplayPort cable. Every MacBook Air with Apple silicon drives at least one external display up to 6K at 60 Hz (Apple), and 5120 × 1440 fits in that. One owner reports 144 Hz on an M4 Air. Above 60 Hz on older Airs, we haven’t seen a confirmed report.
Can the G9 charge my MacBook?
No. None of the 49-inch G9s has USB-C power delivery, so keep the Mac’s charger plugged in.
Why does text look softer than on my MacBook?
Because macOS runs 5120 × 1440 at 1×, with no Retina scaling: the same density as a 27-inch 1440p monitor. A sharp “looks like” mode exists, but it shows a smaller desktop (3840 × 1080 at most on a Pro or Max chip).
Can I use it as two monitors?
With picture-by-picture, as two 2560 × 1440 inputs: that needs two cables and a Mac that drives two displays. With one cable, draw two halves (or any split) in Shoji and windows snap into each half as if it were its own screen.
Does Samsung have its own app for this?
Samsung offers Easy Setting Box, which divides the screen into preset layouts, and lists a macOS version for some Odyssey models (Samsung). Its product page says Windows only, so check your model’s support page.
Shoji · window zones for Mac works with any brand, so the MacBook’s screen and a monitor from another maker get zones too. You draw the zones yourself, right on the screen, any size and overlapping if you want. And the G9 keeps its own layouts: Shoji recognizes it by its hardware and brings them back when you plug it in again.
Shoji · window zones for Mac
Draw zones on each monitor, drag a window over one, and it snaps in. $4.99 once; if it isn't for you, your money back within 14 days.
$4.99 once · one Mac · macOS 15 or later