Using a reliable application like Mailvita Split PST for Mac which lets you split bulky PST files into smaller sections without losing data & is the easiest method for managing large PST files on a Mac. It preserves email layout attachments and folder hierarchy & gives a variety of split choices and operates perfectly on all macOS versions. You can efficiently split large PST files into manageable files by just uploading the PST file choosing the split option and saving the output. This will help you avoid corruption concerns and Outlook performance issues.