next after os x Lion?
What should I upgrade to? I have OS X Lion.
iMac
What should I upgrade to? I have OS X Lion.
iMac
The answer depends on which Mac you have, and how old it is. Can you tell us?
If you haven't been downloading all of the released OS's, you will have little choice as to what you can upgrade to regardless of what Mac you have.
Of the OS's after Lion and excluding El Capitan, Mountain Lion is the only one that can be installed--and you have to purchase it.
Deciding which of those two would depend on your hardware as Csound1 has asked.
iMac late 2009 with 12GB memory
Then you can (and should) upgrade to El Capitan (which is free from the Mac App Store)
Check to make sure your applications are compatible.
Applications Compatibility (2)
El Capitan 10.11 Compatibility information
Also check to make sure there is a compatible driver for your printer.
Do a backup before installing, preferable 2 backups on 2 different drives.
next after os x Lion?