Apple Releases iOS 18.4, macOS 15.4, and Other x.4 OS Updates

[jtbayly (Joseph)]

@Simon

But with 15.4, upon opening such a .dat file, I’m shown a intimidatingly sounding dialog telling me that Apple cannot deem these files safe for my use

I’m guessing that this is because of the extension. Is it possible for you to simply use a different extension when creating the files? That might bypass the need to use the other solutions mentioned above.