I have 2011 MacBook Pro that I have not used for a while. Now I am back to using it and would like to upgrade to the latest OS available. Currently, it is 10.6.8 an here are the issues
When I try to download the MacOS High Sierra from the App store, the "Get" button is grey and nothing happens when I click it. In fact, all the apps are like this and I cannot use the App store to download anything at all (I have signed it with my Apple ID).
Cmd+R at the booting is not working so I cannot even restore to factory settings.
I do not have recovery disks.
Could you please help me to sort this out as I am not familiar with Mac that much.