Are you not referring to the Edit History in Ps? This is found on the History tab. The history remains as long as your document is open. If you save it as a PSD, JPEG, etc. and close the file, this history is saved to the file and cleared. When you open the document again the previous history will be gone.
If you save the document as a PSD, the Layer structure is saved, unless you have flattened or merged the layers.
Yes As Dave told if you are looking for history then go to windows in photoshop and select History.
Not in history. If you do a "SAve AS' to convert a PSD to JPG the location default is Temporary Edit location.
This location is wherever you choose to save the document. If you open a PSD, and then save as JPEG, without changing the file or folder location, it will most likely be saved in the same location from where you opened the PSD.
Okay my question is where can I access the temporary edits folder in finder? I see the folder when I choose "save as", but cannot find it in finder.