I have a new IMac and a Brother MFC-7860 DW. Today I scanned an image and then went to scan another image and Photoshop 6 would not recognize the scanner. If I turn off and on the Brother or restart Photoshop it recognizes the printer. This is ridiculous. Does anyone know how I can fix this.
Check for the latest firmware and drivers first.
This will show you how to set it up. You might check it to be sure.
Brother International - Frequently Asked Questions OSx driver install and configuration.
I have an MFC 6490CW myself. I use the wireless function and it seems to work well through my router, scan or print on my Macbook running Mavericks.
I use Photoshop CC and CS6.