Fusion Drive - APFS or Extended Journaled

Globibahn wrote:

Oh, I did not realise. I've been running Catalina over a month, was I not aware my fusion drive was APFS? I though tit was still extended journaled but I'm not too sure.

If you click on your drive and press "command + i" or select "Get Info" from the Finder "File" menu, an info window opens and it will list the format.

Anytime. 😎

I have two iMacs with Fusion drives. Both APFS formatted. Both work fine.

Just to add, Catalina requires APFS so you have no choice if you want to run Catalina.

You're welcome. Fragmentation is not an issue.

You're welcome. When Catalina is installed it automatically converts all drives, HDDs, SSDs and Fusion to APFS.