What's the script to find the original date a photo was taken?

[KeyJess]

Hello!

I'm brand new to the tool and it worked excellently on updating the dates of photos I uploaded from my iPhone to Google Photos and then downloaded to my MacBook. I used the following script:

exiftool "-FileModifyDate<DateTimeOriginal" *

However, I have a bulk of photos I downloaded from Google Drive in Google Takeout and I get this error message:

Warning: No writable tags set from IMG_9744.jpg
    0 image files updated
  112 image files unchanged

What is the proper script for me to explicitly see the date that I originally took the photos? Thank you!

[Alan Clifford]

I'd suggest you first have a look to see what is there:

exiftool -a -G IMG_9744.jpg

[StarGeek]

Since I saw this on Reddit first, I answered there before I saw this post.