Mac, and Mac only. macOS 15 (Sequoia) at minimum, on Apple silicon as well as Intel.
There is no Windows version, no Linux version, no iPhone or iPad version, and none is planned: the app rests entirely on the macOS wallpaper mechanism, which has no equivalent anywhere else.
That is normal, and it happens once. A window points out that the app came from the Internet and that it has been checked by Apple: confirming is enough. It will not come back.
If you see something else — "cannot verify it is free of malware", or "the app is damaged" — then the file is not the one we publish, or the download was interrupted. Download it again from this page; if the message comes back, write to me: that is a fault on our side and I want to know about it.
Every one the system reports. The picture is cut at each display's real bounds, including when your panels differ in resolution, orientation and pixel density.
The setups it is developed and used on every day:
If your setup differs and something goes wrong, write to me: that is exactly the kind of report that moves the app forward.
Decoding is hardware-accelerated and shared across displays — one pass, not one per panel. The wallpaper suspends when you leave a desktop, and it can suspend on battery.
It happens, and it is not your doing: the registration of the small startup helper with macOS gets stuck. The blockage comes from the system, not from the app.
Everything else works. Your animated wallpapers run normally as long as MyDynScreen is open — only the automatic launch at login is missing.
No point restarting the Mac: macOS deliberately keeps this state, and a restart does not reset it. If you hit this, write to me — that is exactly the kind of report that moves the app forward.
Only the ones you explicitly ask for, and never without a backup first. Each original value is recorded at the moment it is taken, and handed back exactly as it was when you take control again.
Drag the app to the Trash. Before that, use the Maintenance screen to restore your wallpapers to their original state: that is what hands back cleanly what the app had taken.
No. No telemetry, no account, no identifier. The only network call is the update check: the app asks our own domain whether a newer version exists, and a single switch turns it off.
The store's sandbox forbids writing the system's animated wallpaper files, and the interface that lets an app be a wallpaper provider is not public. No app in this category is on the store, for the same reason.
I read everything. No account to create, nothing to install: this form is enough, and you get an acknowledgement straight away. A reply usually comes within a few days — MyDynScreen is made by one person.
Your address is used only to reply to you. It is added to no list, nothing is passed on to anyone, and the form drops no tracker.
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