{"id":8661,"date":"2026-04-23T10:19:08","date_gmt":"2026-04-23T10:19:08","guid":{"rendered":"https:\/\/www.macsonik.com\/blog\/?p=8661"},"modified":"2026-04-23T10:38:41","modified_gmt":"2026-04-23T10:38:41","slug":"ost-file-not-syncing-on-mac","status":"publish","type":"post","link":"https:\/\/www.macsonik.com\/blog\/ost-file-not-syncing-on-mac\/","title":{"rendered":"Why OST File Is Not Syncing on Mac & How to Fix It Quickly"},"content":{"rendered":"\n\n
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User-Query:<\/strong><\/p>\n

“My Outlook mailbox on Mac is not updating, and I’m not receiving new emails even though the internet is working fine. It looks like the OST file not syncing Mac properly. How can I fix this issue quickly without losing my mailbox data?”<\/span><\/em><\/p>\n

— Posted by <\/span><\/em>“Mia Anderson”<\/em><\/strong><\/p>\n<\/div>\n

Summary:<\/strong> Is your OST file not updating on Mac? It can be frustrating when Outlook stops updating emails, calendar entries, or contacts properly. You may notice missing messages, delayed inbox updates, or folders not refreshing at all. However, many Mac users face this issue when using Outlook with Exchange, Office 365, or IMAP accounts.<\/p>\n

The good news is that OST sync issues are mostly fixable. In most cases, the problem is related to internet connectivity, account settings, Outlook cache problems, or outdated software. To fix OST not syncing error, we are here with some common reasons and how to fix it quickly.<\/p>\n

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