July 25, 2026
Your desktop just entered its chaos era
Show HN: SpinWin – A macOS menu bar app to visually rotate or spin any window
Mac users are spinning windows for fun, and the comments are loving the chaos
TLDR: SpinWin is a Mac menu bar app that makes windows look rotated or spinning by showing a live visual copy instead of changing the real app. Commenters were split between delight and nitpicky window-hiding problems, with big nostalgia for the old days of silly, playful desktop effects.
A tiny Show HN project called SpinWin has the internet doing a double take: yes, it really lets you rotate any Mac app window like a crooked photo frame, or even spin it endlessly like your laptop just joined a carnival ride. The maker admits Apple doesn’t actually let apps do this the normal way, so SpinWin pulls off a clever illusion instead: it hides the real window, shows a live picture of it, and twists that picture around on screen. Translation for normal humans: it looks wild, it works, and no, you can’t actually click inside the spinning fake window.
But the real show is in the comments, where the vibe is somewhere between nostalgia, curiosity, and mild window-management trauma. One developer immediately jumped in with a very relatable complaint: trying to shove windows off-screen on a Mac usually leaves behind an annoying 1-pixel sliver of shame in the corner. That turned the thread into a mini detective story: did SpinWin find a secret workaround, or is it hiding the same visual scar? Meanwhile, another commenter went full throwback, comparing it to the glorious era of Linux “wobbly windows,” basically declaring: tech used to be fun, and maybe it can be fun again. And in the most understated reaction of the bunch, one user simply declared it “Very handy,” which is objectively hilarious for an app whose main trick is making your screen look possessed.
Key Points
- •SpinWin rotates or spins a selected macOS window by displaying a captured overlay rather than transforming the real window.
- •The app hides the original window off-screen using the Accessibility API and captures it continuously with ScreenCaptureKit.
- •Rotation is applied to a transparent overlay window through a CALayer transform, allowing arbitrary angles and continuous spinning.
- •The app requires Screen Recording and Accessibility permissions, and the release is signed with a Developer ID and notarized by Apple.
- •Current limitations include non-interactive overlays, visibility of the hidden window in Mission Control/Exposé, possible off-screen rendering throttling, and imperfect handling of source-window resizing during rotation.