If your query is, "How I can find pictures on my Mac which were mistakenly deleted", then there might be various approaches to reach the solution.
When pictures are no longer visible, it is best to install Amrev Photo Recovery Software in the Mac PC. This software is easy to process and will thoroughly scan your PC to find deleted photos, music files and other multimedia files from Mac hard drive as well as other portable storage devices. This user friendly software application is highly recommended for Mac as it works great for Mac HFS+/FAT/NTFS/NTFS5 file system on Mac OS X 10.6/10.7/10.8/10.9/10.12 versions.
Step 1 : Download and Launch the software and select the drive from which photos needs to be recovered and click on "Next" button.
Step 2 : Now select the file types and click the "Next" button..
Step 3 : It will scan your removable/fixed drive for selected file type. Upon completion of the scan, you will be able to recover your deleted files in the form of a well organized tree sorted with respect to file types. Save the recovered data to a safe location by checking the photos you wish to save and click on "Save" You may select the "ROOT" folder to save the entire recovered photo, audio and video files.