Network wifi catalina bettertouchtool. Asked yesterday. Alexander Zhang. 3answers 103 views Catalina update from Mojave: how to continue the download from where it was? From Mojave in System Preferences / Software Update, I'm trying to update to Catalina. Catalina takes about 8 GB. Since 'upgrading' to Catalina the search function in Preview (when looking at PDFs) sometimes does not work for me. Restarting Preview sometimes lets it work for a few seconds. Well the other thing that's really obviously weird is that my computer now always switches to dark mode every day around 5pm, no matter what I set it to.