Hi huygir,
Welcome to the Sony Community!
If you're unable to download the PlayMemories Home software on your mac computer, please run the PlayMemories Home Repair Tool. If you have a previous version of PMH installed in your computer, please uninstall it first before running the tool.
Please follow this article to learn more about the different methods of importing your files to a Mac.
If my post answers your question, please mark it as "Accept as Solution". Thanks_Mitch