Dropping my Office subscription and moving to the built in Apple Mail on the same Mac. Outlook for Mac holds about 30GB across two accounts plus local On My Computer folders.
What moves by itself and what needs pushing?
Migrate from Mac Outlook to Apple Mail
Solved Email & Outlook
AJ
Andrew Jackson February 14, 2019
2 replies
6,280 views
Reviewed by moderators
Split the job by where the mail lives, because most of it moves itself.
The two accounts: if they are IMAP or Exchange, add the same accounts in Apple Mail and the server sends everything down fresh. Nothing exports, nothing converts, the 30GB minus the local folders just re-syncs. Do this first and let it run.
The On My Computer folders are the real migration since they exist nowhere but inside Outlook's database. The drag route works without any tools: in Outlook for Mac select the messages of a local folder, drag them to a Finder folder where each becomes an .eml file, then in Apple Mail create a matching mailbox under On My Mac and drag the .eml files in. Folder by folder, tedious past a dozen folders but free.
For lots of local folders the smoother path is exporting an OLM archive via File, Export in Outlook, converting OLM to mbox with a converter, SysTools OLM Converter does this, then Apple Mail's File, Import Mailboxes in mbox format pulls the whole tree in one pass with the hierarchy intact.
Accounts re-synced overnight on their own. Had 22 local folders so went the OLM to mbox route, one import and the whole tree arrived. Subscription cancelled.