Aircast Flasher

The first time you open the Flasher on a Mac, you'll probably see this:

Why it happens: macOS quarantines anything downloaded from the internet and won't open an app unless it's been notarized by Apple, a paid step where Apple scans and approves the developer's build. The Aircast Flasher is a free, open pre-release that isn't notarized yet, so macOS shows the generic is damaged message instead of letting it run. Apple Silicon Macs are especially strict about this.

The fix: after dragging the app into Applications, clear the quarantine flag once in Terminal, then open the app normally:

xattr -dr com.apple.quarantine "/Applications/Aircast Flasher.app"

It runs silently, so no output means it worked. Now open Aircast Flasher from Applications.

Right-clicking the app and choosing Open (or Open Anyway under Privacy & Security) usually won't clear the damaged state on Apple Silicon. The command above is the reliable path.

On Windows you'll likely see a blue Windows protected your PC screen the first time you run the installer:

Why it happens: SmartScreen warns about any app it hasn't seen from a known publisher. Earning that reputation requires a paid code-signing certificate and enough downloads for Microsoft to build trust. The Aircast Flasher is a free, open pre-release that isn't code-signed yet, so it shows up as an unrecognized app from an unknown publisher.

The fix: click More info, confirm the app is Aircast.Flasher, then click Run anyway:

The installer then runs as normal.

Linux doesn't gate unsigned apps, so there are no warnings to click through. Make the AppImage executable and run it:

chmod +x Aircast.Flasher*.AppImage && ./Aircast.Flasher*.AppImage

The .deb installs with your package manager as usual.