Certain Keynote transitions are pixelated

Hello clp698,

Thank you for using Apple Support Communities!

I understand from your post that when using Keynote on your Mac the transitions are pixelated during the transition. I recommend testing the issue while your Mac is in safe mode and/or in a new user account. This will help determine the cause of the issue. The following articles have the steps you will need to test the issue in both safe mode and in a new user account: 

Use safe mode to isolate issues with your Mac - Apple Support

How to test an issue in another user account on your Mac - Apple Support

Best Regards.

Another potential solution - at least it fixed my pixelated animation issue... uncheck the option to "Apply motion blur to animations" in the Keynote > Preferences > Slideshow > Displaying panel solved the problem!

I'm also getting this bug. It happens with Move, Magic Move and Scale and also happens on files that used to work perfectly (pre-Catalina).

For an example of what the bug looks like, see here: https://d.pr/v/1yuOAA

Thanks RadRes!!! This solved the issue! I sent it to Apple twice, only to have the wipe and replace my logic board the first time, then wipe my system the second time. This was such an easy fix, but is definitely a bug they need to fix. =)

clp698,

If testing in safe mode and a new user account did not resolve the issue, you may want to contact Apple Support for additional assistance.

Contact Apple Support

Regards.

Same issue for me and has not resolved with 10.15.2 update.

So glad to help! I agree - there should be some internal check when upgrading the OS or migrating to a new computer to verify that this setting is not needed/applicable. Happy Keynoting!