When using the About this Mac selection from the Finder menu below the Apple icon,
in the little window of that name, when you click the information immediately below
the OS X, that should say Version 10.9.5, then click the same place again, and Build
number (may vary) should appear; click a third time and your product Serial number
appears. You can use this information to help correctly identify the OS X & build series.
Also, the total of memory RAM installed, appears; so does the processor specification.
•How to Know Which version of Mac OS X my computer is running:
https://it.uoregon.edu/node/3320
•How to identify iMac models - Apple Support
•Identify your Mac - Lookup by serial number:
https://www.powerbookmedic.com/identify-mac-serial.php
There are other places to look in the running system, to tell if you may have a second
system, a different partition, or other questionable action going on. There is a way to
use the command line in Terminal to see what is going on, and other less complex ways
for a lay-person who is not experienced, to look at some information reports that can be
generated. One of them is the etrecheck report. It will show what is in the computer. But
not an entire complement of information that a inquiry via Terminal utility can.
•About Etrecheck (story + how it can be used + download product)
http://www.etresoft.com/etrecheck_story
Not sure exactly what the issue is you are facing, the computer may or may not have
a problem; what made you try to update software? If it has Mavericks, what does the
App Store or Software Update page show you? Do not upgrade to try & solve an issue.
Hopefully some information gained will be of help.
If the computer says it has Mavericks 10.9.5, it
probably does. However, what you need or hope
it to accomplish may require a different direction.
It may have older applications, or other problem.
Good luck & happy computing! 🙂
