Quick Update: Apple just issued a surprise release of the next version of Mac OS, known as “Catalina”.
This release breaks older, “32-Bit” application software, meaning some programs will simply not run.
I *HIGHLY RECOMMEND* waiting to update to Catalina and only after doing an inventory of your mission-critical apps to make sure they are 64-bit ready.
***IF*** you do decide to upgrade, make absolutely sure you have a bootable clone backup of your computer BEFORE upgrading to Catalina. Do NOT update that backup after you upgrade, or you can’t restore back to your pre-upgrade state.