The guys over at ScummVM added another update recently, heres the lowdown:

Last year, we added support for three of Sierra's Hi-Res Adventure games: Mystery House (#1), Mission: Asteroid (#0) and Wizard and the Princess (#2). We're proud to announce that three more Apple II games are now playable in ScummVM and ready for testing: Ulysses and the Golden Fleece (#4), Time Zone (#5) and The Dark Crystal (#6). For Ulysses and the Golden Fleece, we currently support the Load 'N' Go budget release. For Time Zone and The Dark Crystal we support the disk images that can be found on some of the Sierra collection CDs. The Datafiles wiki page has been updated with the required filenames for the disk images.
If you own one of those classics, grab the latest daily build and try it out! If you encounter an issue, please post a bug report following our testing guidelines. And while you're at it, please take some screenshots!
You may be wondering what happened to Hi-Res Adventure #3: Cranston Manor. Unfortunately, we still have not been able to locate a copy of this game after looking for it for over a year. If you own it, we'd love to hear from you!

More info --> http://www.scummvm.org/news/20170617/