Typically, a freeze (sometimes referred to as a "freeze," "freezing", "hang", "spinning cursor", or "rainbow wheel") occurs when an application is waiting for a response from the OS or another process.
In the event an Adobe application becomes unresponsive, support or engineering may request Sample Process or Spindump to help in determining the cause.
A freeze and crash are completely different incidents. To report a crash:
Launch Activity Monitor, which can be found in the Utilities folder located inside the main Applications folder.
In Activity Monitor, make sure that CPU is selected and select "Photoshop" from the list under Process Name:
You can use the search field in the upper right of the Activity Monitor dialog to search for the name "Photoshop" if you have a long list of processes.
Switch back to Photoshop and repeat your steps until the freeze occurs. While the freeze is occuring in Photoshop, go to back to Activity Monitor, click on the gear and select Sample Process:
You may need to enter your admin username and password.
After the process is complete a new window opens up to display the diagnostic. Click the "Save..." button in the upper right and save the file to your desktop.
The only personal information contained in these diagnostics is the path to the application being sampled.
For further information see Apple's documentation for Run system diagnostics in Activity Monitor on Mac.