Could not open because of a disk error.

[Rblissjr]

I just purchased a new mac mini that will be dedicated to photo editing. It is running Catalina operating system. 

I loaded the Creative suite and when I try to launch Photoshop from inside lightroom I get an error window saying "

Could not open “_RCB1708.ARW” because of a disk error. I tried opening from several different folders and different files from different drives. Same result.

When I take the drives and attach to my old Mac Pro running Mojave, everything works perfectly.

I tried uninstalling Photoshop and re-installing and the same error.

External drives were tested with disc utility and passed.

I believe the issue is a communication item between photoshop and the drives but since im not sure what to do... here I am. I appreciate the help.

[John Waller]

>> I loaded the Creative suite 

Please confirm exactly which version you're trying to run.

Non-Cloud versions (CS6 and earlier) should not even install on Catalina since Catalina has dropped all support for 32 bit software and CS6 (and earlier) come with 32 bit installers.

[Rblissjr]

I am using the very latest Creative Cloud and it is up to date. Photoshop 2020 and Lightroom classic.

[Nancy OShea]

If everything runs fine on Mojave, I would stick with that OS. 

Only the latest versions of Creative Cloud apps will run on Catalina.  And even then there are known issues you should be aware of.   See links below.

• https://helpx.adobe.com/x-productkb/global/fix-macos-64-bit-compatibility-errors.html
• https://helpx.adobe.com/photoshop/kb/photoshop-and-macos-catalina.html

As John said, legacy Creative Suite will never work much less install on Catalina.  That potential ended with Mojave.

[Rblissjr]

I reinstalled Mojave as a last resort and Photoshop is now performing properly.