Currawong5 wrote: I can not find my photos on my mac HD?
Can you open the settings in Photos? At the top it shows the path it's trying to follow to your Photos Library.

By default, the Photos Library is named "Photos Library.photoslibrary" (clever,) but it could have another name. Photos Libraries are usually stored in the Pictures folder like the one above. If you look there and find that it is just a few megabytes, then it may be empty and not the one you're looking for.
If your Library was put somewhere else, you can search for it with the finder. No matter what it's named, the extension will be ".photoslibrary" so you can use that in a search:
It looks like one of mine wandered into the Documents folder. You can use it from where you find it, or you can drag it back to the Pictures folder where it normally lives.
If you double click on this Library, it should open in Photos. But because you've upgraded your operating system, it has to first adjust itself to the new database system, and this could take a few minutes. Apple recommends that you make a copy of the Library before letting it upgrade.
Do you use iCloud to sync your devices? If so, do you have "Optimize Storage" checked?