In yesterday’s blog I revealed that I can “convert” PNG files to TIFF files just by changing their suffix in the operating system. In fact no conversion is taking place; the file name is being changed, and that’s it. Somehow Photoshop can open a TIFF file that is actually a PNG file (or vice versa) due to the fact that the file structure is similar.
Today’s Mysterious Forces adventure is more complex, and more mysterious.
My wife, a graphic designer, received a handful of files on Wednesday for a four-page newspaper advertising “wrap” ad. Several of those files were corrupt. One of them was an .eps file, probably from Illustrator, and the others were corrupt JPEG images, none of which would open in Photoshop, but all of which would display correctly in InDesign (strange!).
She needed to open the JPEGs and at least look at them, to be sure that they had no repairable flaws. But she could not open them.
So, following the advice of local Mac guru Justin Sharp (mentioned in yesterday’s blog), I removed the suffix from each of the offending files (using Get Info). When you attempt to remove the suffix from a file, the operating system challenges you: are you really SURE you want to do this?
And, I did it, leaving one of the JPEGs with no icon, and no suffix sitting on the desktop.
When I double-clicked the icon, Mysterious Forces went to work on the file, creating a duplicate file with a JPEG suffix, and a correct icon showing the image of the document. This took just a few seconds.
When I double-clicked on the new document, it opened in Adobe Photoshop, and was no longer corrupt. The original file is still corrupt.
I tried this with the corrupt .eps file also, removing its suffix altogether, and then double-clicked on the orphaned icon. As with the JPEG, the file opened immediately in Adobe Illustrator, intelligible and as originally intended.
I am amazed by this, and I have no idea who/what is doing the work. Is it the operating system? Is it an Apple Event? Is it some tendril of Adobe Photoshop or Illustrator? Is it Preview?
Whatever it is, it works, and it solved the problem of the corrupt files.
By the way, I was able to open one of the corrupt JPEG files in Graphic Converter, the shareware graphics application that we all seem to have in our Applications folder. The others would not open in that application. None of the corrupt files would open in Preview, Apple’s low-end image application.