The Fireworks CS4 10.0.4 Update for Mac OS X is now available. You can get it through the Adobe Update Manager or download it from the Adobe Support website.
This Updater is for Mac only, and fixes all known critical bugs. There is no Windows 10.0.4 updater, because there are no known critical bugs (critical = security, crash or data loss).
The team really would have liked to have gotten this Updater out to you sooner, but it just wasn’t possible before now.