Where can I download Mojave 10.14.0?

There is no macOS Mojave 10.14.0 download available, Apple removes all previous full installer versions of an OS

from the App Store when a newer version is released.

Are you trying to upgrade your mac to macOS Mojave.

Have you been trying to upgrade your mac using the updates downloaded from

the Apple Support Downloads page.

The updates there for Mojave are exactly that they are updates and these can only be installed if

your mac is already running an earlier version of macOS Mojave.

That is probably why you see the 'you need 14.0 error message.

(As usual Apples error message give you no clue as to the real issue)

To install a new OS you need the full installer app which you can only get through the

App Store.

Here is how to get the full installer app.

Open Safari and click on this link, 

How to get old versions of macOS – Apple Support

Go to the Download OS section and click on macOS Mojave.

This will redirect you to the App Store Mojave download page,

it should say Get or Download.

This will download the Install macOS Mojave.app to your Applications folder

it is 6.05GBs in size, and looks like this. This will install the full Mojave

operating system version 10.14.6 (the last version available) and is all

you need.

Before upgrading make a full back up of your Mac.

Check that third party apps you use have updates available for the new OS.

https://roaringapps.com

Check that your printers/ scanners etc have updated drivers and software available for the new OS.

Connect your mac to your router via cable rather than rely on WiFi.

Do not use your mac while it is downloading

and do not use any other devices that share the same internet connection.

If the App Store says ‘Open’ then it is detecting a previous download of the install app

go to the Applications folder locate Install macOS ******.app.

Move it to the Trash, empty the Trash.

Restart, click on the link again, the App Store should say ‘Get' or 'Download'.