Common Backup File Format for Mac and Windows
Outlook should have the same backup file formats, regardless of the platform/host. If neither PST or OLM are appropriate, a new file type should be developed to become a universal standard, in order to create seamless workflows.
Currently, is like having two Photoshop file types (PSD and PSSomething), depending on the operating system you're working, making it a very unproductive process.
Andrew Lindsay commented
I agree. A cross-product solution would be extremely useful. I would also suggest a means to create the archives automatically would also be of great use to aid users in having a robust data security system.