"PhpStorm does not have write access to /Applications/PhpStorm.app/Contents"
I am unable to update PHPStorm due to the above error message. However, if I navigate to that folder and check permissions, they look fine.
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From your second screenshot, I see that the app is owned by the `admin` user, and the permissions for other users are `r-x`, which means they don't have write access to the file.
I suspect that you're using a different user account (not `admin`) to run and update PhpStorm.
Please open the Terminal, run `sudo chown -R $(whoami) /Applications/PhpStorm.app/`. This will change the ownership of the PhpStorm application files to your user.
Then try to update the PhpStorm again.