How to update mac from 10.10 to 10.13
There is no direct update path from macOS 10.10 to macOS 10.13, as these operating systems use different versions of the MacOS kernel, Core runtime, and XCode development environment. However, you can upgrade to macOS 10.11 from macOS 10.10 using the appropriate installation media and tools supplied with that version of macOS (or available online), then install macOS 10.12 using the same procedure.