Inside PopMirror: A Camera Mirror in the Mac Menu Bar
PopMirror is a small Mac utility from 1dot1 that lives behind a mirror icon in the menu bar. It does one job: show the front camera, mirrored, the moment it is clicked, and put it away the moment it is not needed. This teardown walks through the app screen by screen and explains the decisions behind each part.
The need is familiar to anyone who works on video calls. Before joining, most people want a quick look at their hair, their collar, the light on their face and whatever is behind them. The usual way to get that look is to open a video app, wait for it to start, find the preview and close it again. PopMirror turns that into a single click from anywhere on the Mac.
A mirror under the menu bar
Clicking the mirror icon opens a panel directly underneath it, the same way a system menu opens. The panel holds nothing but the camera image, filled edge to edge with rounded corners, so the reflection is the only thing on screen that asks for attention. There are no buttons over the image, no toolbar and no title bar.
The image is mirrored by default, because that is what a mirror does. A camera that shows the true orientation feels wrong when someone reaches for their hair: the hand moves the other way on screen. Mirroring can be switched off from the options menu for anyone who wants to see themselves as others on the call will.
Check before you join
The most common use is the few seconds before a meeting starts. A glance shows whether the collar is straight, whether the lamp behind is too bright, and whether the laundry is in shot. Because PopMirror is not a video calling app, there is no risk of joining a meeting early by accident or of a call starting while the preview is open.
The panel opens in well under a second. PopMirror starts the camera when the icon is clicked and shows the image as soon as the first frame arrives, so the delay is only as long as the camera itself takes to wake up.
One click in, one click out
Closing the mirror takes no aim. A click anywhere outside the panel closes it, as does a second click on the icon. The panel behaves like a menu rather than a window: it never appears in the Dock or the app switcher, never hides behind another window and never has to be dragged out of the way.
This is also why the mirror has no settings of its own on screen. Anything that stayed on the panel would sit on top of the reflection, and the whole point of the panel is to be looked through.
Options on a right-click
There is no settings window. A right-click on the icon, or a Control-click, opens a short menu instead. It holds the mirror size, the list of cameras when more than one is connected, the Mirror Image switch, Open at Login, About and Quit. Every choice is remembered between launches.
The menu bar icon is drawn to match the app icon: a round mirror in a U-shaped cradle on a stem and base. It is a template image, so macOS tints it to match the other icons in both light and dark menu bars.
Three sizes
The mirror comes in three sizes, all in the 16:9 shape of the FaceTime camera. Small is 320 points wide, enough for a glance at hair and collar on a laptop screen. Medium is the default and suits most checks. Large is 640 points wide, for a closer look at lighting or background on a big display.
Three fixed sizes were chosen over a resizable window on purpose. A panel that opens from the menu bar should open the same way every time, and dragging a corner to resize it would turn a one-click tool into a window to manage.
Any camera on the Mac
PopMirror uses the built-in FaceTime camera by default. USB webcams appear in the right-click menu as soon as they are connected, and on macOS 14 Sonoma or later an iPhone used as a Continuity Camera shows up there too. Picking a camera switches the mirror straight away if it is open, and the choice sticks until another camera is picked.
If no camera is available, the panel says so in plain words instead of showing a black rectangle. If camera access has been turned off, the panel explains why the image is missing and offers a button that opens the camera section of Privacy & Security in System Settings.
Camera off when closed
A camera app in the menu bar has to earn trust, so PopMirror keeps its promise simple. The camera starts when the mirror opens and stops when it closes. The green camera light next to the lens is the proof: it comes on with the panel and goes out with it.
Nothing is recorded, no photos are taken, and the app contains no networking at all, so the image never leaves the Mac. macOS asks for camera permission the first time the mirror opens, and that is the only permission PopMirror ever asks for.
Built in black and white
Like the other 1dot1 Mac apps, PopMirror is greyscale throughout. The only colour on screen is the reflection itself. The app icon is a classic vanity mirror on a stand, drawn in black on a white tile, and the menu bar icon repeats the same shape at a much smaller size.
It is a universal app for Apple silicon and Intel Macs and runs on macOS 13 Ventura or later. It needs only camera access, has no account and never connects to the internet.
Get PopMirror
PopMirror is available on 1dot1 as a single download, with a README and the licence inside the zip.