How can I upgrade my macbook for OS X 10.7 to the latest version

Have been having problem with my macbook . I can't doing anything on it . it's requesting for an upgrade for SO X 10.7.5 to latest version
 
Stepping out on a limb here, but are you sure this is legitimate? Without looking it up, I'm not sure there is any Mac out there that supports 10.14 AND 10.7. 10.14 is the current with 10.15 out soon.

Also you need to be a lot more specific than "I can't doing anything" on it if you want specific help. I have an old, but still relevant link in my signature if you care to continue.
 
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