[KevinH]

No, this is a result of Apple's Gatekeeper changes. It does not trust Sigil (any new version being installed) and will not allow Sigil to save it's changes because it thinks incorrectly that Sigil is up to something.

The trick is to convince the macOS that you can see Sigil's MainWindow by simply resizing the MainWindow first. Then once resized you can update things and Sigil will be allowed to write to its own ini file.

For our next release, I will actually try to get Apple to notarize Sigil so all this nonsense goes away. But deep inside I am very upset because that gives Apple complete control and say about a totally free OpenSource software that is not released through their Mac App store. They literally convince people it may be a danger/malware even though Sigil collects absolutely no information from any user, and has ever single line of source code open to the public to review if they so desire (or build their own).

The next OS version of macOS will even prevent the right-click and use Open twice to launch Sigil. Apple just keeps closing down their desktops making them into silly appliances and taking a real nanny approach to what you can do on your own machine and share with others. Sad really.

If I do not notarize Sigil, then we would have to make source code only releases for MacOS and macOS users would have to build their own (just like Linux).