macOS - feature request: Support unified toolbar style window appearance

[katekm]

On macOS 26+, windows using the unified toolbar style have a distinct appearance with larger rounded corners. QWindowKit currently does not support this window styling. It would be helpful to have a configuration option to enable it.

Note: Building against the macOS 26 SDK (Xcode 26 or newer) is required to get the updated extra-rounded window corners.
Earlier SDKs (macOS 11–14) support the unified toolbar APIs, but do not include the new corner radius design introduced in macOS 26.

[wangwenx190]

Thank you so much for the suggestion! This does indeed look like a feature we are interested in. However, unfortunately, we currently lack dedicated macOS developers and mostly rely on community contributions. Therefore, feature requests for the macOS platform may not be implemented very quickly. We hope you can understand.