When you upgrade macOS or migrate content to a new Mac, software known to be incompatible with the new macOS version is set aside and won’t run on your updated system. The software is moved to a folder named Incompatible Software, at the top level of your Mac startup disk.
If you want to use one of the incompatible apps, get an updated version that's compatible with your new OS. Apps in the Mac App Store list their compatibility and system requirements on their product pages. You can also check with the app developer to find out if they have a new, compatible version or plan to release one.
What Are Some Mac Software Apps Free
PowerPC applications won't run on OS X Mavericks or later.
What Are Some Mac Software Apps 2017
Elmedia Player It’s a free media player app for Mac OS X which supports a great variety of audio and video formats. Some of the supported formats are SWF, FLV, MP4, AVI, MP4, MOV, DAT, and MP3. You can also upgrade to pro version to get extra benefits of download videos from the web.