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I have a Macbook pro mid 2012 that I didn't use it for a long time so I didn't upgrade it .
now I cannot install anything from app store because all of them need new version of OS ,
Apple iTunes 12.10.8: Download, manage and playback music from your computer. Nov 07, 2019.
also I cannot install any version of newer OS .
I decided to upgrade OS step by step , I search OS Mavericks in app store but it doesn't show anything , I searched in google and downloaded 10.9.5 and other update versions , but it says you should have 10.9 first .
also when I click on ' software update ' it says ' No updates available '
can anyone help me plz ?