Hi there! Thanks for reaching out. I understand that when you press the OK button to play something on the Hallmark+ app on your Mac running OS X 10.13, nothing happens, though other apps are working fine. Let's try to get this sorted together.

First, just to confirm:
- Are you logged into the Hallmark+ app with your account?
- Did this issue start suddenly or after an update?
- Have you tried any steps already to fix it?

Meanwhile, here’s a recommended approach we can try step-by-step:

1. Restart the Hallmark+ app: Quit the app completely (use Command + Q) and reopen it.
2. Log out and back in: If you’re logged in, try logging out, then log back in to refresh your session.
3. Reboot your Mac: Restarting your system can clear out any temporary glitches.
4. Uninstall and reinstall the Hallmark+ app: Sometimes, app files can get corrupted. Removing and reinstalling the app can restore it to a fresh state.
- To uninstall: drag the Hallmark+ app from the Applications folder to the Trash and empty it.
- Then, download the latest version of the app again from the official Hallmark+ website or the Mac App Store.
5. Check for updates to OS and app: Make sure your Mac OS (10.13) and Hallmark+ app are both on their latest versions to ensure compatibility.

If after these steps the OK button still doesn’t respond, it could point to a specific bug or account issue. In that case, I’d recommend contacting our support team at [email protected] for more detailed diagnostics.

Could you try these and let me know what happens? I’m here to help you through the process.

Are you satisfied with this initial guidance?

I have it on my TV with Roku and it is not loading

Thanks for letting me know you're having trouble loading the Hallmark app on your Roku TV. Let's work through some troubleshooting steps to get your streaming working again.

Here’s what to try on your Roku device:

1. Restart your Roku device:
- Press the Home button on your Roku remote.
- Go to Settings > System > System restart to reboot the device.
This can clear temporary glitches causing the app not to load.

2. Update the Hallmark+ app:
- On the Home screen, highlight the Hallmark+ app.
- Press the * button on your remote to open options.
- Select "Check for updates" to make sure you have the latest version.

3. Uninstall and reinstall the Hallmark+ app:
- Highlight the Hallmark+ app on the Home screen.
- Press the * button and choose "Remove channel."
- Restart the Roku device again (per step 1).
- Re-add the Hallmark+ app by navigating to the Roku Channel Store and searching for it.

4. Verify your internet connection:
- Make sure other apps on your Roku are working fine (you mentioned they are, which is good).
- Still, if you notice network issues, try restarting your router.

5. Sign out and back into your Hallmark+ account in the app:
Sometimes a session refresh helps.

If after these steps the app is still not loading, it might be related to your account or a temporary service issue. You can check Hallmark's service status or reach out to [email protected] for further tailored assistance.

Here's a helpful link with similar tips from Hallmark’s official help page for Roku streaming issues if you want to review further:
What should I do if I'm having trouble streaming on my Roku? [1]

Give these a try and let me know how it goes! Are you satisfied with the solution I provided?