fOS Preview

fOS PC 10.15 Preview Program

Welcome to the fOS Preview Download Page.

You must have purchased fOS UP 10.14 or later, and have signed up to the fOS Preview Program here, and have access to your Preview Key, which would have been emailed to you after you signed up.

These versions of fOS have been slightly modified.

View the fOS Preview Update Log...

Dev Channel

The Dev channel is updated every 3 weeks.

Download

Beta Channel

The Beta channel is updated every week.

Download

fOS Developer Preview

Coming Soon.

Google Sites

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