MAC OS Catalina
Can Mac OS Catalina be used on a 2012 Macbook pro retina? I upgrade ro Catalina but now most of my apps no longer work.. trying to figure out why.. thanks
user’s MacBook Pro 15"
The apps that don't work are likely 32 bit apps. 32 bit apps do not work with Catalina. Contact the app developers and get their 64 bit upgrade if they have 64 bit upgrades. One example would be Microsoft Office 2011 is 32 bit. To run Microsoft Office on Catalina you need 64 bit Office 2019 or Office 365.