OS X Catalina - Dock has disappeared

I'm also having the same problem. Multiple monitors and eGPU. I also notice that when the doc disappears, notification centre also stops working (I can't access it by using the two finger swipe from the right).

Typically a reboot, not connected to monitors solves this, but I've done this a few times and still no luck. Hope Apple comes up with some fixes in this area soon!!

I have experienced this same issue after upgrading my MacBook Air 13" 2017 to macOS 10.15 Catalina. Rebooting the Mac caused Dock to disappear.

Running command defaults delete com.apple.dock; killall Dock in Terminal resolved the issue, but Dock disappears again after reboot.

I am so sick of my Mac, it used to be lightyears ahead of Microsoft. It is now a complete crock - it gives me nothing but trouble and bugs. Honestly Apple, pull a finger out and get your act together. This is junk software

I would understand your sentiment if you were referring to a non-Beta software deployment. Do you realize this is BETA software. The purpose of BETA is to work out bugs like the ones mentioned in this thread. That is what we are all doing. Then Apple gathers that info and try to fix these things before the official release.

Fixed this bug by reverting back to Mojave (10.14. 6) Think I'll stay on that till Catalina is fixed. The only problem I found doing that is; After the CMD+R reboot blue tooth is turned off and Magic Mouse & Keyboardare turned off. Had to use a USB mouse and USB lead plugged into the keyboard. Cannot figure out why blue tooth is off after CMD + R?

I had the same problem and followed the advices (e.g. deleted the com.apple.dock.plist -file). However, the problem returned after reboot. Killall Dock -command helped, but was required after each reboot.

For some reason, like wookie_uk, I had an additional com.apple.dock.plist -file in my Library/Preferences (com.apple.dock.CCF42A11-A6CB-5C82-BF44-DD39BD90D8EE.plist). Found this when searching for dock -files in Preferences-folder.

I deleted this single file, which seems to have solved my problem. Since then my dock has been acting normally also after reboots.

I have experienced this twice right after boot up yesterday and now. I don't have multiple monitors. When I go to adjust the size it appears, and disappears after I'm done adjusting. if I reboot the computer it appeared yesterday, will see what it does today. I am also using an iMac 2017.

I found out that by clicking on the dock size slider button it shows and disappears again with each click.

Definitely a bug. But can be temporary fixed by 'clicking' on the size slider on my MacBook Pro.

The same thing happened to me but after I monkeyed around with changing the size of of the dock in the settings and then gave up, shut down my machine for the night and when I logged in the next day, like magic, the dock was mysteriously back.

Dock has disappeared, mine as well, settings all good, should be there.

What I really want to know is why I have to spend time to try and find some extra solution to "fix" the basic settings already set on my machine. This is really really poor Apple.

Yup, I had exactly the same problem, slightly exacerbated by another bug that's crept into Catalina, as my login password I need to hold SHIFT I noticed that the SHIFT doesn't work for the characters being entered...

Have had the same problem on my MacBook Pro. Each time I think I've fixed it by fiddling with the dock preferences, it disappears again on the next re-boot. I didn't get this problem on my iMac, but on that I lost my entire music library on upgrade. I'd rather have had the dock problem on both.

I found a way!!!

Put a file on your desktop.

Drag and drop that file to the dock (any folder or recicle bin will do)...Dock will appear.

Go to Dock setting, and select SHOW dock.

It should stay visible now.

Changing the dock settings in System settings did not work for me, but following sure did:

To prevent the Dock from hiding, open Terminal and execute the following command:

defaults write com.apple.dock autohide -bool false; killall Dock

autohide -bool false turns off the autohide. killall Dock kills the current Dock process. It will then automatically restart with the autohide setting off.

This fixed it for me on my MacBook Pro 13" (2015) with or without the external display. But it fixed another Dock problem too, which is that apps were filling the screen behind the Dock even when it is set not to automatically hide and show the Dock. After applying this setting, the apps don't fill behind the Dock.

I've also read that there is an update for this, but it's not showing up for me in System Prefs / Software Update.

This is a pretty obvious bug. I'm surprised it made it into the software release cycle.