[Lizard]

Without commenting on unreleased operating systems...

If OmniFocus can't sync down your database from a fresh install, that suggests your database is rather large. Manually moving the database to your device may work around the issue, but sooner or later you may run into other problems because of this.

I encourage you to chat with our Support Humans (omnifocus@omnigroup.com) about slimming down your database before trouble strikes.