[Solved] Bug with TinyPNG-JPG Photoshop plugin and macOS Catalina

Error message of the TinyPNG plugin under Photoshop

Almost all photos in my WordPress blog are exported from Photoshop via a special plug-in, which makes the graphics for the web particularly small. The plugin comes from the people who offer an online service under the domain www.tinypng.com to optimize photos for small storage space. If you throw in a bit of money, you also get a plugin called "TinyPNG-JPG.plugin", which you can install in Photoshop in order to save image files directly from the Adobe software with an export command.

Up to macOS Mojave the plugin ran without any problems, but when I upgraded my MacBook Pro to macOS Catalina I always got the following error message when I started the export via TinyPNG:

"TinyPNG-JPG.plugin" cannot be opened because Apple cannot search for malware in it. This software needs to be updated. Contact the developer for more information.

Now there are the options "Show in Finder" and "OK". Both of these do not help me much in solving the problem, because I know myself where the file is - and the "OK" button ends my export and I am left without a web-optimized image file. An update is also not helpful, because I had already loaded the latest version of the plugin and installed it again.

Under macOS Catalina, the Photoshop plug-in from TinyPNG unfortunately only throws errors that have to be fixed.

Under macOS Catalina, the Photoshop plug-in from TinyPNG unfortunately only throws errors that have to be fixed.

The bad alternative: export via Photoshop function

Since I didn't know how to solve the problem, I have used the Photoshop function "Export as ..." over and over again over the last few days, which is, however, very cumbersome. Unfortunately, this export function does not remember the selected settings and so you have to select again and again that you want to export a JPG and that it should have the quality 80%, for example. This is not very user-friendly and annoying in the long run.

Adobe's own export function in Photoshop is unfortunately very forgetful and requires the same settings every time.

Adobe's own export function in Photoshop is unfortunately very forgetful and requires the same settings every time.

The solution: Change the security settings of macOS

So I was forced to look for a solution on the Internet again today and when I entered the error message I ended up in a forum thread that belongs to completely different software (a game from EA), but also with the TinyPNG-JPG plugin helped.

The solution to the problem lies in the security settings of macOS Catalina. How to solve the matter is explained here in short steps:

  1. Go to System Settings> Security
  2. In the "General" tab, a message should appear at the bottom that the opening of a program has been prevented.
  3. Next to the note, click on the "Allow anyway" button.
  4. You may have to enter your admin password here.
  5. If you start another export, you will receive a message from macOS the first time you call it up, but you can now also select "Open".

When I switched back to Photoshop after switching, the error message mentioned above came up again, but I had the opportunity. This is normal, as the new security settings will not take effect until the next start of the export. After this last mistake, everything was fine for me and Photoshop exported the image via the TinyPNG-JPG plug-in without any objections.

Once you have made the security settings, the Mac will ask you again whether you really want to open the program.

Once you have made the security settings, the Mac will ask you again whether you really want to open the program.

 

The renewed test export did not reveal any further error messages.

The renewed test export did not reveal any further error messages.

By the way, the plugin is really a recommendable thing for people who often create or edit graphics and photos for websites. You can create PNG and JPG files with very small file sizes without being able to see any visible loss of quality in the image.

In the System Settings> Security, in the General tab, you can still allow TinyPNG-JPG to be executed.

In the System Settings> Security, in the General tab, you can still allow TinyPNG-JPG to be executed.

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