You can use the TrustVare OST to PST Converter Tool to import OST files to PST files easily. This trusted app supports all Windows OS and Microsoft Outlook recent versions. Customers can recover OST corrupted database files. Furthermore, it provides the option to show the preview OST files and filter specific data. user-friendly UI for every user. Before buying the application, customers can utilize the free demo edition.

Visit here: https://www.trustvare.com/ost/pst/

If you want to import OST files to PST on Mac, use the ToolsCrunch Mac OST to PST Converter Tool. Users can import OST to PST files with all versions of Mac OS, like 14, 13, 12, 11, 10.15, 10.14, and 10.13, and Windows OS, such as 11, 10, 8.1, 8, and 7. Before the migration process, it permits users to preview the OST files and filter the selected database. Easily manage all emails, attachments, contacts, calendars, and notes from OST to PST files. To recover all the OST deleted files by using this tool. For experience purposes, users can try out the free demo version and convert a few emails from OST to PST files.

Get more information here: https://www.toolscrunch.com/mac-ost-to-pst-converter.html 

I would like to refer to a perfect and dependable solution to import OST file to PST on Mac OS. This program exports all OST mailbox data such as emails, contacts, calendars, journals, etc. into PST format without compromising any item. And, it will smoothly work on all editions of macOS, Win OS, and Outlook. Free demo is also available to check out the entire program functioning.
Visit here- https://www.macmister.com/ost/

To import an OST file to PST on a Mac manually, you’ll first need to use a Windows system with Outlook installed. Unfortunately, macOS does not support direct OST file imports, so you must first convert the OST file to PST using Outlook's "Import/Export" feature on Windows. Once converted, you can transfer the PST file to your Mac and import it into Outlook for Mac.

For a simpler solution, the BLR OST to PST Converter Tool can help. It seamlessly converts OST files to PST without needing a Windows system, making the process more efficient for Mac users. The tool ensures safe conversion, maintaining data integrity, and offers an easy-to-use interface for importing large OST files directly to your Mac.

Visit:- https://www.blrtools.com/ost-to-pst-converter.html

The most effective solution to save OST files to PST formats is the MailConverterTools OST to PST Converter. It is an exclusive tool that can effortlessly converts OST files into different file formats. This software offers innovative features for easy and accurate conversion of OST files. Also, it allows users to import OST files to Gmail, Yahoo Mail, AOL, IMAP, and other email clients with attachments. Moreover, users can use this tool to perform bulk conversion of OST files.

To know more: https://www.mailconvertertools.com/ost-to-pst/

To manually convert an OST file to a PST file, first, open Microsoft Outlook and go to "File"> "Open & Export"> "Import/Export." Select "Export to a file," choose "Outlook Data File (.pst)," and then select your OST file to export.
Alternatively, you can use Sysinfo OST to PST Converter which is the finest and most efficient utility for converting an OST file into an Outlook PST file with 100% accuracy and no data loss is a versatile software that not only converts OST to PST but also supports other formats such as MBOX, PDF, JSON, and more. This multi-functional tool ensures accurate conversion and preservation of data. https://www.sysinfotools.com/ost-to-pst-converter.php