Stan wants to know if he should wait until Big Sur or upgrade to macOS Catalina now? Leo says that you have to upgrade to Catalina first, since it eliminates all 32 bit apps. This will give you time to convert your other 32 bit apps to 64. It'll be pretty straight forward. But moving up to Big Sur may be more problematic because of how they approach kernel use. But you could wait and see what happens and stick with Mojave until Big Sur comes out and then see if you have to. Why do it twice if you don't really have to?
Ron has a new iMac which he updated to macOS Catalina. But now he can't get it to print to his HP OfficeJet. He downloaded the latest drivers, but that hasn't helped. Leo says that those drivers may not be for macOS Catalina. Go into the System Preference page and see if it sees the printer. If it does, then select add and let macOS download the drivers itself. You may also need to remove the printer and then add it again.
Tom got a message from his iPhone 11 Pro that his phone was almost full. So he's been moving stuff off. But how does he back up his playlists? Leo says you can do it wirelessly. Go into settings and look in "about" to see what's taking up all the room. Then, you can go into the Music app and delete the music artist by artist. But in Catalina, you can still sync in the music app as you used to with iTunes. Select Sync check songs only.
Joe upgraded to macOS Catalina and has now lost his ability to use Adobe Photoshop CS5. Leo says that's because CS5 was a 32-bit app, and macOS doesn't support 32-bit apps anymore. You can subscribe to Adobe Creative Cloud, but that's really your only option. You can subscribe to Adobe Photoshop and Lightroom for $9.99 a month. If you need other apps, then you're looking at the $52.99 a month full option. One thing to consider is buying Adobe Photoshop Elements. That's about $89.
Tom wants to know what is the advantage of updating to macOS Catalina and can he? Leo says it depends on how old the Mac is. He may not be able to go all the way up to Catalina! In general, he wants to stay up to date. But that one caveat is the 32-bit issue. Check out this link - https://support.apple.com/en-us/HT208436
George has an iMac, but it won't let him upgrade to Catalina. Leo says to go to the Apple Menu and look under System Preferences. There's an update feature there, so select the gear. It'll run the update check. He can also look for the compatibility checker here - https://www.apple.com/macos/catalina/.