iTunes for my iMac using Monterey 12.3.1

You can't. iTunes for Macs was discontinued and replaced by other apps when macOS Catalina was replaced and it cannot be installed on Macs that are running Catalina, Big Sur or Monterey. See the following for information on the replacement apps: What happened to iTunes? - Apple Support

In Monterey, and since Catalina, actually, the iTunes was split into other apps that got parts of its functionality. See this What happened to iTunes? - Apple Support

Since iTunes is no more, can anyone tell me what the updated version of this Terminal command would be now?

sudo chmod +x /Applications/iTunes.app/Contents/MacOS/iTunes

I used its sister command (-x instead of +x) to disable the Play/Pause button on my keyboard, because it was getting confused and controlling the media playing in my browser as well as controlling my Spotify app. It was also always opening the Music app by default if I accidentally hit the button.

I regret that now and I'm trying to re-enable it, but I'm getting an error in Terminal:

chmod: /Applications/iTunes.app/Contents/MacOS/iTunes: No such file or directory

Which makes sense, since there is no app named iTunes on macos 12.3.1 anymore. But now I'm stuck.

Does anyone have any idea how I can reactivate the Play/Pause button on my Mac keyboard?

Thanks!

I'm using iMac Monterey12.3.1 up to date, How can I download iTunes to sync with my Iphones

Again, see What happened to iTunes? - Apple Support. In Catalina and later the Music app is used to manage your music and Finder is used to sync that to your device.

tt2

See the instructions for syncing using Finder in the following: Sync iPhone with your computer - Apple Support

Did you have a question for your fellow users? If you're asking about iTunes on Monterey, Big Sur, or Catalina, see What happened to iTunes? - Apple Support.

tt2

How can download iTunes for my Mac using Mac 12.3.1

Read the post above yours that explains why you can't, and that there are replacements for iTunes.

tt2

How can I use I download iTunes for my iMac using Monterey 12.3.1?

You don’t! Read the entire thread, please.

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