From telegraphics.com.au - September 10, 2016 4:41 AM
PSD/PSB Converter to Gimp XCF layered format

Standalone command-line (Terminal) tool to convert Photoshop layered PSD files into Gimp's XCF (v1) format. Also may help recover damaged PSD files.
Very fast and reliable conversion (e.g. less than 2 seconds to convert a 40MB PSD to compressed XCF, on a 2004 model PC). Note: Currently converts image layers only.