Guides · Mac
How to add borders to windows on a Mac
macOS does not draw window borders you can style, so you need an app. Windowcase draws a textured frame around every window on your Mac, in materials such as walnut, marble, brushed aluminum and leather. Borders stay sharp at any size and follow windows as you move and resize them, and the app needs no Accessibility or Screen Recording permission. It runs on macOS 14 Sonoma or later and costs $4.99 once.
Steps
- Get Windowcase. Buy it through Polar for $4.99. The licence key in your receipt email works on up to three Macs, and Windowcase asks for it the first time you open it.
- Pick a texture. Choose from 14 textures, from walnut and marble to brushed aluminum, leather, carbon fiber and circuit board.
- Set thickness and corners. Adjust the border thickness and corner style, and choose a separate look for unfocused windows: no border, the same texture, or a different one.
- Leave out the apps that should stay bare. Exclude apps such as games, video players or screen sharing. Borders also hide automatically in Mission Control and in full-screen apps.
Good to know
- Switch textures automatically with light and dark mode, or on a day and night schedule.
- Optional animations add a glint when a window gains focus and a slow shimmer on metal textures.
- Windowcase has no built-in updater: download new versions from Polar’s customer portal.
- It is free software under GPL-3.0, derived from JankyBorders by Felix Kratz.
Get Windowcase Everything about Windowcase →