Catilalina (null) ????

@pcbjr,

Try here: https://support.apple.com/downloads/macos

All three installations of 10.15.4 were released on April 8. None is 8.23 GB (3, 4.73 and 1.02 GB), altogether they make 8.75 GB. Go figure.

I had the same issue. System preferences update (null) downloading 8 gb, and then not installing, asking me to download again.. Solved it by going to https://www.apple.com/macos/how-to-upgrade/ follwing the "upgrade now" link to the app store and downloading it from there. That gave me the installer below that just worked. Hope that helps!

Sorry for the confusion. I replied to something farther up expecting that replies would be threaded.

At https://support.apple.com/downloads/macos there are three dmg files named

"Download macOs Catalina 10.15.4 Update"

"Download macOs Catalina 10.15.4 Combo Update", and

"Download macOs Catalina 10.15.4 Supplimental Update".

This looks like it could be an alternate way to upgrade to Catalina. If so, do I install all three? Does the order matter?

I had this exact issue. Catalina was downloading to the Applications folder for some reason. Follow these steps:

1. Open Finder
2. Click Applications Folder
3. Locate "Install macOS Catalina"
4. Open File

This should bring you to the familiar screen for installing macOS Catalina.

Background: I have the same problem, and am running the same OS, macOS 10.14.6 Mojave.

@ClassicII

Was the Software Update pane displaying like this:

when you downloaded the update? Or was it displaying normally? Does anybody know how the supplemental update is displaying in Catalina?

I am curious if anyone else is getting these errors while opening System Update? Open up the Console application first then open Preferences and click on System Update. The appeared immediately afterwards for me—including a few other faults. It could be a coincidence, if others see the same results then probably not. I think this is a result of the latest security update pushed out to Catalina this last week. At least that's when I noticed this change.

Allowing process impersonation by process com.apple.preferences.softwareu (1098) despite not having the com.apple.private.defaults-impersonate entitlement due to it not being sandboxed. Please add com.apple.private.defaults-impersonate instead, this will stop working in the future.

Allowing process impersonation by process com.apple.preferences.softwareu (1098) despite not having the com.apple.private.defaults-impersonate entitlement due to it not being sandboxed. Please add com.apple.private.defaults-impersonate instead, this will stop working in the future.

Attempted to open an encrypted database

It probably means the update server doesn't have a version number for the update. Given that a supplemental update was released yesterday, it might be confused to the version number that should show. The download should give the most current version which would be the 10.15.4 with supplemental update

When you install it, it downloads 8.23GB then displays the same screen with "Upgrade Now" as the only option. Pressing the button starts the whole download over. I tried three times. An internet search shows the problem is widespread since 2019.

Those are updates, not upgrades. This thread is about upgrading to Catalina, not updating it.

You have to already be running Catalina to use those.

The 10.15.4 update takes you from 10.15.3 to 10.15.4

The 10.15.4 combo update will update any Catalina OS (10.15.0 to 10.15.3)

The supplemental update is a patch for problems found in the 10.15.4 update.

@Barney-15E,

pzulw0 is evidently referring to the three installations to which I pointed above. I'm guessing that the combo installation would be a good start, and once Catalina has been installed, the supplemental update with appear there in the Software Update. That's why I asked, above, how the supplemental update appeared to those who already have Catalina. No answer.

@pzulw0

OK, so you've bitten the bullet and pressed Update. Are you sure this didn't result in an Install Catalina application being downloaded to Applications? This seems to be what ClassicII describes above. You would need to run that to continue with the installation.

OK, thanks. That explains the size discrepancy I noted above.

Another possibility might be to look in the Apps Store for Catalina. It might just invoke the Software Update in System Preferences, though.

I'm guessing that the combo installation would be a good start

Only if you already have Catalina installed from the App Store. None of those three updates will install Catalina, they will only update an existing version of Catalina.

Just searched for "Catalina" in the Mac Apps Store, found it, and clicked Get. Then the Software Update dialog appeared, searched and found 10.15.4 and asked whether I really wanted to download it. Since I don't want to upgrade to Catalina right now, I can't way what happens I answer Yes.

@pzulw0: How large is the Install Catalina app in Applications? 8.23 GB?

I faced this issue where i would download to update. The update downloaded but it wouldn’t install and i would only get the option to download again. I downloaded a few times as well. The solution is, once you know it has fully downloaded once, go to your Launchpad, swipe till the end and there you will see the Install MacOS option. Install from there. Hope that helps.

Nothing is there. It should remain like it always has under about my MAC/software update and it always showed the ne west Catalina and MY CHOICE if I wanted to upgrade when I felt time was right due to all the bugs... Something is not right at their end....Should not say NULL