2gb max file size .psd , anyone needs more like me?

Save them as PSB files. They are large format files for over 2gb.

I’m pretty sure adobe Bridge will show a preview. Have you tried it?

John Ellis has PSB Quicklook for OSX. It will render PSB thumbs at the Finder level.

PSB Quick Look Plugin   I'm using it and it does do the job.

Gene

There's a Bridge Preference for this: "Do not process files larger than...". The default value is 1GB.

I'm getting a preview for this file:

Here's the preference setting itself BTW:

If it were bigger it wouldn’t be PSD. All software to read PSD files, such as previewer, would fail or crash. Hence Adobe wisely gave The bigger PSD a new name.