After update to Mojave, launchpad shows only 4 apps per page

Hi Jan,

I encountered the same issue. The solution to the problem can be found here:

http://osxdaily.com/2016/03/09/change-launchpad-icon-grid-layout-mac-os-x/

Best,

FW

1. Quit any open apps on your Mac: macOS Sierra: Quit apps, then restart the Mac: How to turn your Mac on or off - Apple Support.
2. Boot to safe mode: Use safe mode to isolate issues with your Mac - Apple Support.
3. Set up a new user account, and test LaunchPad there: How to test an issue in another user account on your Mac - Apple Support.

Organize apps

• Arrange apps: Drag an app to a new location.
• Create a folder: Drag an app onto another app.
• Close a folder: Click outside the folder.
• Rename a folder: Open a folder and click its name. Then enter a new name.

Add an app

Apps appear in Launchpad when you download them from the Mac App Store.

To add an app to Launchpad that you downloaded outside of the Mac App Store, just move the app to your Applications folder.

If the issue is something other than arranging the apps (for example you see other apps on the page, but only four have their icons loaded), or if you have issues moving and arranging the apps, don't hesitate to respond back. If you do, please just give more details on what you're seeing and what's happening when you try to add/move apps.