Double clicking icons in dock

Start up in Safe Mode and see if the same behavior happens.

Use safe mode on your Mac - Apple Support

Can say with great certainty

On 4 different Apple Computers all running Sonoma 14.4.1

Click the icon in the Dock once will launch the Chosen Application, on the first try

Using the Command Tab will also show all running applications.

You may try Terminal command

Suggest copy and paste to get the spacing correct

Then, hit the return key

 killall Dock

Mongus10 wrote:

Have to click dock icon twice to get to app. Cmd-tab also broken.

I have to click an app's dock icon twice to get to the app I'm clicking on. Say I'm in Safari and I click on Mail. Instead of showing me Mail, it shows me Finder. If I click on Mail twice, it shows me Mail. It's not these specific apps, it's any combination of apps -- both Apple and third-party. Sometimes clicking once on the dock icon works, but half the time it doesn't.

Similar behavior with pressing command-tab. Instead of showing me the most recent app, it shows me some other app.

I see there are other threads with same problem and no solution? Its not a biggie but quite annoying.

MacOS Sonoma

verify your software is up to date…

The current stable release of Sonoma including bug fixes, security updates is macOS 14.4.1

Keep your Mac up to date - Apple Support

Keep your Mac up to date - Apple Support

Command Tab show all running applications...

You can try disabling the new Stage Manager feature and compare your results.

Mongus10 wrote:

Hi Barney, awesome, I tried that and it fixed it. So what do I do know? Rebuild os or something?

If you restart normally and it is still fixed, nothing.

If you restart normally and the problem is back, uninstall the system modification you have installed at some point in the past.