Maeve Rodriguez As someone who regularly switches between my MacBook and an external monitor, I’ve always found Apple’s display settings limiting—especially when I plug into non-Apple displays. macOS tends to hide or outright restrict certain resolutions, which is frustrating if you’re trying to get more screen real estate, especially on cheaper or older monitors.
Recently, I discovered a brilliant workaround using a free utility called BetterDisplay. This app not only gives you access to hidden resolutions but also lets you force higher-than-native resolutions on your external display. Yep—you can run a 4K resolution on a regular 1080p monitor. Sounds too good to be true, but it works. Here’s exactly how I did it.
🔧 Why BetterDisplay?
macOS doesn’t natively support Display Scaling on external monitors the way it does for built-in Retina displays. That’s why everything either looks too big or too blurry when you try to increase the resolution. BetterDisplay bridges that gap.
Even better, its Mirror-as-Extended Display trick allows you to bypass macOS’s resolution restrictions entirely by mirroring a virtual Retina display to your external screen—essentially tricking the system.
🧰 What You’ll Need
- A Mac (Intel or Apple Silicon – both work)
- Your external monitor connected (HD, Full HD, anything)
- The free version of BetterDisplay (get it from the official GitHub page)
- A few minutes of patience
🪟 Step-by-Step: How I Increased My Monitor’s Resolution
1. Install BetterDisplay
Download the latest release from the GitHub repo and install it. You’ll need to allow some permissions via System Settings → Privacy & Security → “Allow apps downloaded from anywhere” (if it warns you). Once done, BetterDisplay will show up in your menu bar.
2. Create a Virtual Display
Here’s where the magic starts:
- Click on the BetterDisplay icon in the menu bar.
- Go to “Displays” → “Manage Virtual Displays”
- Click “Add Virtual Display”
- Choose a high resolution like 3840×2160 (4K) or even higher if you want to push it.
It might look intimidating, but don’t worry—your physical display won’t explode (I had the same fear!).
3. Mirror Virtual Display to Your External Monitor
This is the hack:
- After you’ve created the virtual display, go to BetterDisplay → Displays
- Select “Mirror Virtual Display to [Your External Monitor Name]”
What this does is mirror the high-resolution virtual screen onto your physical screen—even if that screen doesn’t officially support that resolution.
4. Enable HiDPI (Optional but Recommended)
Under the same menu, make sure “Enable HiDPI” is ticked. This gives you retina-like crispness by applying macOS’s pixel doubling.
I tried both HiDPI and non-HiDPI modes and found HiDPI far easier on the eyes—even on a cheap Full HD monitor. Text looks smoother, and scaling works more naturally.
📸 The Result: 4K on a 1080p Display?
Yup. After applying the mirror mode, my external 1080p display was suddenly running at a simulated 4K. More room, more windows, less scrolling. Apps like Figma, Final Cut Pro, and even simple Finder windows now felt way more spacious.
Sure, it’s not true 4K—you’re essentially scaling down a larger image to fit a smaller screen—but visually, it gives you that retina-style sharpness and workspace real estate you normally don’t get without shelling out for a 4K monitor.
⚠️ A Few Tips and Warnings
- Performance: Your Mac will be rendering a larger display and downscaling it in real time. On my M1 Mac Mini, it worked flawlessly. Intel Macs may get warm under load.
- Text size: Some apps may show very small UI elements. You can fix this using System Preferences → Accessibility → Zoom.
- Remember to disable mirroring before unplugging the display, or macOS might freak out.
🧼 Final Thoughts
Honestly, this trick has revolutionized how I work on my external monitors. BetterDisplay is one of those tools Apple should have built into macOS but didn’t. Being able to simulate a Retina display on a non-Retina monitor—without paying for expensive hardware—is a massive win.
If you’re struggling with limited space on your external display, or you’re like me and want more breathing room for your workflow, I highly recommend giving BetterDisplay a shot. Just be ready for a little setup time—and a lot more room to breathe once you’re done.
