Hello!
I have recently opened my 2011 MAC and I have a 2013 version of bit coin on it.
I have tried to upgrade the bit coin version, however, it says I must have a later version of the MAC OS. I currently have OS X 10.9.5 and I am unable to update the OS, according to the APP store and online information.
The errors I am receiving when opening bit coin are: Urgent, Alert key compromised, upgrade required.  Then my home page/wallet screen says Wallet, out of sync, Recent transactions, out of sync.  It has a blue bar at the bottom that says 'synchronizing with network' (catching up, last received block was generated 2073 days) - 43.74% complete.  After this is open for a while, it will produce error: Failed to write undo data and I must click ok and it closes out of bit coin
Is there anything I can do to upgrade my bit coin wallet, without the ability to update my MAC OS?
I am not sure if I have any bit coin but remember looking into this back in 2013.
Any help is appreciated, thanks!