The zolca files are "agnostic" to the computer operation system, so this should be easily possible, the only thing is to tell Safari / Mac to not already unzip zip files when they are downloaded, as zolca files are compressed, and after a "decompression" openLCA does not understand them any more. This is an option in Safari and on a Mac. Then you can simply backup the database from the window system to the Mac system where you can then restore it back again in openLCA. Hope this helps! Andreas