where can I find download for MojaveOS?

How to get old versions of macOS - https://support.apple.com/HT211683

More specifically click on this link but make sure you're using Safari or it might not work.

macOS 10.14 Mojave https://itunes.apple.com/us/app/macos-mojave/id1398502828?ls=1&mt=12

Back up your data, check your applications for compatibility, and if your MacBook Pro is a 2012 or newer model, download Mojave through the link provided. If not, you won't be able to use the download.

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