can an app-specific password for the specific app be used on both iMac and iPhone

Hi buck1213,

Thanks for posting in Apple Support Communities.

Once you have created the app-specific password, you can sign in to the app on your various devices and depending on the app settings, you may be asked to save it in iCloud Keychain.

Sign in to apps with your Apple ID using app-specific passwords - Apple Support

Regards.

buck1213,

Thanks for the additional details. There isn't a way to go back and copy the password if you do not have it written down or saved anywhere. You would have to revoke the password from the specific app and then recreate the password. Save it in order to sign in on other devices with the same password.

How to generate an app-specific password

1. Sign in to appleid.apple.com.

2. In the Sign-In and Security section, select App-Specific Passwords.

3. Select Generate an app-specific password or select the Add button , then follow the steps on your screen.

4. Enter or paste the app-specific password into the password field of the app.

How to revoke an app-specific password

You can have up to 25 active app-specific passwords. If you need to, you can revoke passwords individually or all at once.

1. Sign in to appleid.apple.com.

2. In the Sign-In and Security section, select App-Specific Passwords.

3. Select the Remove button  next to a password you want to delete, or Revoke All.

After you revoke a password, the app using that password will be signed out of your account until you generate a new password and sign in again.

Any time you change or reset your primary Apple ID password, all of your app-specific passwords are revoked automatically to protect the security of your account. You need to generate new app-specific passwords for any apps that you want to continue using.

Sign in to apps with your Apple ID using app-specific passwords - Apple Support

Regards.