Mac OS X non-registered non-developers (general users) and OS X Public Beta Seed Program subscribers can go to Apple OS X Beta Seed Program website to download OS X 10.9.5 Beta 3 (13F14) for Free, and can manually install the update via iTunes without Apple UDID registration and without having Mac OS X Developer Account. If you're running Mac OS X Mavericks v10.9 Final Version (Build: 13A603. Mac os x 10 9 free download - Java Update for Mac OS X 10.3.9, Mac OS X Update, Mac OS X 10.3.9 Update (Delta), and many more programs.
The App Store Updates page only informs you of updates available for the OS you are currently running.
As you are running an older system then you are probably up to date on that system
If you want to install a newer OS that is called an Upgrade.
The model and year of your Mac will determine which macOS you can upgrade to,
read the following links.
Download Mac Os 10.9 5 Combo Updater
Before upgrading make a full back up of your Mac.
Check that third party apps you use have updates available for the new OS.
Check that your printers/ scanners etc have updated drivers and software available for the new OS.
If you are considering upgrading to Catalina be warned that it does not support 32bit apps.
Your Mac is probably running 32bit apps and these will need to be updated to 64bit apps,
some updates may be free, some may be paid. Use this app to discover which apps you have
are 32bit, https://www.stclairsoft.com/Go64/. Once the list has been created you can then
Download Macos 10.9
contact the developers of the apps to see if they provide 64bit updates.
Mac 10.9.5 Update
Dec 21, 2019 11:07 AM