I'm running macOS 10.13.5 and am trying to enable Messages in iCloud on Mac. I went to https://support.apple.com/en-us/HT208532 and completed the "Before you begin", "Turn on Messages on iCloud" and "On your iPhone" sections without issue. It's the "On Your Mac" section where I'm having trouble:
- Open Messages.
- In the menu bar, choose Messages > Preferences.
- Click Accounts.
However, this is not available:
- Select the checkbox next to Enable Messages in iCloud.
Any idea how I can enable Messages in iCloud on my Mac?