Hello! It's great that you are looking to upgrade your Macbook Pro Mid 2010. Before deciding on the operating system upgrade, you can consider a few options that could help you extend the life of your Macbook Pro.
Firstly, you can upgrade the RAM and the hard drive. This can make a noticeable difference in the performance. Also, upgrading to an SSD can help bring a faster and smoother experience.
If you are looking to upgrade the operating system, the latest macOS version that is compatible with Macbook Pro mid 2010 is OSX El Capitan. However, if you are looking for more recent updates, you can consider installing a third-party operating system such as Linux. Google OS (Chrome OS) is not designed for Macs, and hence it won't be a good option for your Macbook Pro.
Before proceeding with any updates, it is advisable to take a backup of your important data. It is not recommended to rely on third-party tools for upgrading your Mac as it could cause issues. You can refer to Apple's official website or visit an Apple store for assistance.
I hope this helps. Let me know if you have any more questions.