Comprehensive Guide to Split/Disunite Large Outlook PST File on Mac
Split Large Outlook PST File on Mac - 2025

If we're talking about email apps in general, we can't forget about Outlook. A lot of people, companies, organizations, and enterprises use it as their main email client. With Outlook, you can send and receive emails over the web. It works on both Windows and Mac OS. People usually use it to keep track of their emails, contacts, calendars, tasks, notes, events, and other useful data.
Personal Storage Table (PST) format is what Outlook uses to store the info. It's a free file format that works with a lot of different email clients and can store emails, projects, contacts, calendars, and other mailbox items. Documents saved in PST forms are organized, and many other services can read and work with them. PST files have smart privacy and security features built in, and they also have a lot of advanced customization choices. The data is easy to share and control between systems.
Outlook is one of the best email apps, and it can easily handle a lot of emails every day. This usually happens when the PST file gets too big, bigger than what each version of Outlook can handle. If you don't want to lose data, you'll need to regularly split big PST files into small PST files. But then the question comes up of how to split an Outlook PST file. First, let's look at some of the reasons why you might want to split the PST file into several smaller ones.
Why You Should Split Up Big Outlook PST Files on Your Mac?
Outlook users send and receive a lot of emails, which makes PST files get bigger over time. When you increase the size of a PST file, the storage space is full, and Outlook on Mac has speed problems. Managing big PST files is hard because they slow down Outlook. Splitting a large PST file is the only way to handle these big files and stop the problem from happening.
There are several reasons why you might want to split a PST file on a Mac
• To keep the data/PST files from getting damaged.
• It's hard to send and receive emails when PST files are too big.
• It is easier to find things in Outlook when you split large PST files into smaller ones.
• Lessening the size of the file fixes the problem of stopping and speeds up the process.
• Once the Outlook PST file becomes inaccessible because of too much data, make it useful again.
We've already talked about some reasons to split Outlook PST files on a Mac that are too big. Now we'll talk about some useful ways to split a big PST file and avoid this problem.
How to Split an Outlook PST File by Hand on a Mac? -
There are a lot of vague solutions on the web that claim to be able to organize big PST files by splitting them up. Because of this, they are not at all safe to handle your important info. It changes the data and you could lose all of your important files. The next part of this article will talk about how to manually sort bigger PST files on a Mac.
In order to get the result we want, let's follow the steps below.
• To begin, open Outlook on your Mac.
• To make a new folder, go to the File menu and choose New > Folder.
• To split a big PST file, select the file and then pick out the mailbox items.
• Choose files from the Inbox, Contacts, Calendar, and Sent folders to divide the PST file.
• Right-click on the things you want to move from your mailbox and choose "Move from the list."
To move the chosen PST files, click on the freshly created folder.
With the steps above, I hope you now know how to split a PST file into smaller pieces on a Mac. Users can only sort a certain number of PST files at a time when they do it by hand. Prior to taking the steps, they must have good technical understanding to avoid losing any data. Now that we've talked about the manual method, let's talk about some of its flaws.
The Problems with the old way of splitting a big PST file by Manual
According to this method, breaking PST into smaller files is not a good option. This method is not a quick and effective way to split large Mac PST files. For users to do the steps properly, they must already know some technical stuff.
When people use the hand method, some of the biggest problems they have to deal with are
• You could lose or damage data if you don't follow these steps correctly.
• Users can't see what the PST files look like while they're choosing which ones to split.
• Not letting you split PST file attachments into different pieces.
• Cutting up PST into smaller files takes a long time and a lot of work.
• To split a big PST file, users have to pick out each file one at a time based on date, size, and sender.
The process of doing it by hand is very difficult and won't give you the best result. Most users move to automated solutions to avoid problems like these. Many pros and users agree that the best way to split large PST files is to use the DataVare Outlook PST Split Tool for Mac. The professional method helps users get around the long process of doing things by hand, which saves a lot of time. It can easily split multiple Outlook PST files at once, protecting users from losing data.
In the End
As we talked about above, you may need to split a big PST file on a Mac. Because of these reasons, we also looked at the manual way to split up big PST files and its problems. This is not a good option for people who are not professionals and who want to split large amounts of data. To get rid of these kinds of problems, users are told to use an automated and professional answer. It works faster and more accurately, and the process of breaking data is smooth.



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