Cannot use Tables in Notes with latest updates.

10.13 sys req...

Mac Hardware Requirements

For details about your Mac model, click the Apple icon at the top left of your screen, choose About This Mac. These Mac models are compatible with macOS High Sierra:

• MacBook (Late 2009 or newer)
• MacBook Pro (Mid 2010 or newer)
• MacBook Air (Late 2010 or newer)
• Mac mini (Mid 2010 or newer)
• iMac (Late 2009 or newer)
• Mac Pro (Mid 2010 or newer)

10.14 sys req...

To run macOS Mojave, you’ll need a Mac that was introduced in mid-2012 or later, with the exception of 2010 and 2012 Mac Pros that have Metal-capable graphics cards installed. So, to break that down by model:

• MacBook (Early 2015 or later)
• MacBook Air (Mid-2012 or later)
• MacBook Pro (Mid-2012 or later)
• Mac mini (Late 2012 or later)
• iMac (Late 2012 or later)
• iMac Pro (all models)
• Mac Pro (Late 2013)
• Mac Pro (2010 or later with Metal-compatible GPU)

Check to make sure your applications are compatible.

Application Compatibility

Also check to make sure there is a compatible driver for your printer.

Do a backup before installing, preferable 2 backups on 2 different drives.