Hello. You can use Variables in the Destination section of the Copy/Move dialog to do this.
1. Select the images you want to move
2. Call up the Copy/Move Photos dialog (macOS: Cmd-y / Windows: Ctrl-y)
3. In the Destination pane, specify a root folder and then you can have PM move photos into new folders based on variables {year4} and {monthname}.
In this example (see attached screenshot), I chose my root folder as "/users/micko/Pictures/Demo/CopyMoveDemo" and then I added "{year4}/{monthname}"
Photo Mechanic copied the photos to a new folder structure [...]/CopyMoveDemo/2021/April. etc etc.
Some important things to keep in mind:
1. There is no "undo" on copy/move actions, so try it on a small number of files first to make sure you are getting the results you expect.
2. The dialog will Copy the files, unless you check the box for "Move (delete originals)"
3. If the folders do not already exist, Photo Mechanic will create them on the fly. This is good for speed because you don't need to muck about creating a whole folder structure first, but if you mess up your destination to something you don't expect or commit a typo, PM won't warn you, it will just create new folders. So, see #1
4. Variables will work the same way in the Ingest dialog, so if you are moving files around that way, you can still use the variables in those folder fields.
5. This depends on the files having correct capture time dates in their metadata. If you have images without correct dates, you might run into unexpected results. You can set new Capture Dates on files with the Adjust Capture Dates and Time tool under the Tools menu.
More documentation on Copy/Move Photos:
https://docs.camerabits.com/support/solutions/articles/48000223598-copying-photosMore on Variables (There are different variables that will fill in "January" or "Jan" or "01" depending on how you want it to end up.
https://docs.camerabits.com/support/solutions/articles/48000207639-introduction-to-photo-mechanic-variablesAdjust Capture Dates and Times:
https://docs.camerabits.com/support/solutions/articles/48001200335-adjust-capture-dates-and-timesHopefully this points you in the right direction!
Mick