You can read PST files on MacBook without installing Outlook  by using a dedicated PST viewer. One option is MacSonik PST Viewer , which lets you open and explore Outlook PST files directly on your Mac. You can view emails, attachments, contacts, calendars, and other mailbox data without importing the file into Outlook.
To get started, download and install the MacSonik PST Viewer on your MacBook. Launch the software, add your PST file, and select it to load the mailbox contents. You can browse email folders, read messages, check attachments, and search for specific emails when needed. It can also help you inspect large or password-protected PST files, depending on the file's condition and password requirements.
If you prefer a manual approach, you can use a compatible email client or transfer the PST file to a Windows computer with Outlook installed. However, these options may require additional setup or software.
For a more direct way to access PST data on macOS, explore MacSonik PST Viewer and choose a method that fits your needs without installing Outlook on your MacBook.