I have 2012 versions of CS6 & Lightroom. I purchased a new computer with a 4K screen (3840x2160) after downloading the start-up screen text is too small too see. Need a magifying glass. Is there a patch or setting or something I can do to view both programs at normal sizes. They can't be used as is.
You do need to update both software to get versions that know how to deal with the hi-res monitors.
Unfortunately, since I don't have a 4k monitor, I don't recall what the lowest versions are that support them.
Go to your system display settings and try reducing the display dimensions below the native resolution.