Apple's latest OS ver 15.4 killed my chess program

Ralph6410 wrote:

The bit I pasted cane from this forum, I believe. Asked the Google and came up with several identical suggestions.

It’s still not correct for this case.

Google (AI and GPTs more generally) are too often wildly wrong.

This is probably the article to which you are referring:

Open a Mac app from an unknown developer - Apple Support

I believe there once was a right-click menu shortcut to force the opening of an app, but that Sequoia removed it, leaving the procedure described in the Support article as the only option; if it still is available.

Note Apple's warning:

"Overriding security settings to open an app is the most common way that a Mac gets infected with malware. You should not override security settings if an app hasn’t been checked by Apple, even if the app looks like it comes from a major developer. The safest approach is to look for a version of the app from the Mac App Store or look for an alternative app."

Yes and upon further investigations

refer below

The Developer may need to rework their application to meet the newer version of Sequoia 15.4 ?

That is the best guess I could offer

The thing is, there is a lot of room between macOS 11 and later versions plus Apple Silicon M1 and current version of macOS and M1 machines

The newer Apple Silicon machines have since evolved to the M2, M3 and the current M4 units

If deleting the app, restarting, and re-installing it doesn’t clear this, the app vendor is the next step.

That Google answer is seemingly not relevant to this case.

The "Open Anyway" option you were looking for is only apps that have been downloaded from a third party source and used an installer. That is not the case for any app downloaded from the App Store. Contacting the developer is the best way to resolve a problem such as this, and they will likely be able to issue an update. They did have an update a week ago, but you probably already have that one.

The only Tiger Chess Pro application I can find in the Apple Apps Store

Is designed to work on an iPad

Not all applications designed to iOS will automatically mean they will work on a different Platform >> macOS as example

You may consider asking the Developer if they plan on Porting the application to macOS

Ralph6410 wrote:

I “think” the method of installing the app is what the latest version of update 15.4 caught. Because the app is designed for iPad/iPhone it can’t be found/installed from the App Store.

An iPhone or iPad app developer can tell the App Store to allow installation of their apps on Apple Silicon Macs. (Given the differences between iPhones, iPads, and Macs, not all do.)

The developer had me copy the program from my iPad and paste it into the application folder on my MacBook. That worked just fine… until it didn’t.

Maybe they ought to tell the App Store to allow installation on Apple Silicon Macs, instead.

That is, assuming there aren't any show-stoppers (e.g., in the UI)( that would make this inadvisable.