How can I update my computer to macOS 10.14.0. ?

The Age of this computer will Govern what newer version of macOS it will Qualify to install. Use About this Mac from the Apple Icon on Desktop - the required Information will be there.

With the above information in-hand - follow this How to get old versions of macOS and verify what version this computer Qualifies to install. Make sure to use Only Safari to commence the download as Other may not work

Back up your data, check your applications for compatibility, and if your MacBook Pro is a 2012 or newer model, click on Mojave. Otherwise, you can't.

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