I've tried Google but I can't find where house styles are stored on a Mac.
I'm on MacOS Monterey v12.4. 2021 M1 Mac.
Thanks!
House styles folder on Mac
The Reference manual says where it is. If you don't have a copy these can (mostly) be downloaded from the web.
If you search the manual for House styles, then go to User-editable files, it will be somewhere like (for Mac OS X:)
/Users/username/Library/Application Support/Avid/Sibelius/House Styles
If you search the manual for House styles, then go to User-editable files, it will be somewhere like (for Mac OS X:)
/Users/username/Library/Application Support/Avid/Sibelius/House Styles
Sibelius 6.2, 7.5.1, Windows 11