# Mac OS 27 Dorico bug report **URL:** \ **Category:** Dorico\ **Tags:** dorico-4\ **Created:** [September 19, 2026, 4:27am UTC](https://forums.steinberg.net/t/mac-os-27-dorico-bug-report/1041627 "2026-09-19T04:27:12Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![Zalde](https://avatars.discourse-cdn.com/v4/letter/z/c0e974/32.png) [@Zalde](https://forums.steinberg.net/u/Zalde)\ **Post date:** [September 19, 2026, 5:41am UTC](https://forums.steinberg.net/t/mac-os-27-dorico-bug-report/1041627/5 "2026-09-19T05:41:17Z")
Welcome to the forum. This has been reported multiple times over the last couple of days. See for example this post with a response from the developers: > [@macOS 27 input via midi keyboard result in hanging note](https://forums.steinberg.net/t/macos-27-input-via-midi-keyboard-result-in-hanging-note/1041359/53): > > I have been looking into this and am reasonably confident that this is indeed a bug in Core MIDI’s MIDI 2.0 support in macOS 27. My sense is that other apps might not be vulnerable to the bug because they’re only using Core MIDI via the MIDI 1.0 APIs. I’ve submitted the necessary information to Apple via Feedback Assistant for them to consider. We will investigate whether a workaround is possible on the Dorico side in the meantime, but we are not in an ideal position to release a new Dorico 6.2… There is also a workaround mentioned below Daniel’s response by a fellow forum user. --- _[View the full topic](https://forums.steinberg.net/t/mac-os-27-dorico-bug-report/1041627)._