[KevinH]

No. I only meant that updating to Sequoia that has been out officially only 2 months is probably not something for everyone.

FWIW, I could already both extend and mirror my screen to my iPad and iPhone using the earlier version of macOS, but to each his own.

Testing and reporting issues is always fine. Thank you.

It is just that early releases of macOS are often very broken and do not get fixed by Apple until many minor releases have come and gone.

If you read my earlier reply, I think this is an extra "security" change by Apple. It is really Qt that vets its software against Apple releases and trues to make sure gui things work.

There have already been two MacOS releases that crashed for no reasons which we had to track down and work around in Sigil only to undo those changes when Apple and or fixed its issues. You helped test workarounds for both of them.