The Mac OS equivalent to 'My Computer' on Windows is 'Finder'.
Click on Finder icon to open it:
To view all files and folder, click on:
Finder menu > Go > Computer
Outputs:
Mac OS Finder helps you access and organize most of the important Mac OS X functions while you work.
Use Finder keyboard shortcuts to display windows, copy and move files, and launch applications.
These keyboard shortcuts help you get things done more efficiently.
For more information, see here.
Finder: Photos:
By default, the photos and videos you import into Photos are stored in the Photos library in the Pictures folder on your Mac.
When you first use Photos, you create a new library or select the library that you want to use.
This library automatically becomes your System Photo Library.
Note: to avoid accidentally deleting or corrupting a Photos library, do not alter the contents of a library in the Finder. If you want to copy, move, or transfer files, first export them from the Photos library; do not manually access or change the library in the Finder.
For more information, see here.
To configure finder to show Pictures folder when you open it:
Finder > check Pictures in Finder preferences
