# de-booting and re-partitioning my Mac

**URL:** <https://boards.straightdope.com/t/de-booting-and-re-partitioning-my-mac/475946>\
**Category:** Factual Questions\
**Created:** [December 6, 2008, 3:39am UTC](https://boards.straightdope.com/t/de-booting-and-re-partitioning-my-mac/475946 "2008-12-06T03:39:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Northern\_Piper](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/northern_piper/32/5304_2.png) [@Northern\_Piper](https://boards.straightdope.com/u/Northern_Piper)\
**Post date:** [December 6, 2008, 3:39am UTC](https://boards.straightdope.com/t/de-booting-and-re-partitioning-my-mac/475946/1 "2008-12-06T03:39:35Z")

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I have a Mac book that I partitioned using Bootcamp. Turns out I allocated way more space to the Windows section than I needed, so I want to re-partition it with a bigger share for Mac OS.

How do I do it without losing data? Do I have to back up everything on both partitions, or can I just copy the data I’ve got on the Windows side and de-partition, then re-partition and allocate a smaller portion to the Windows?

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**Author:** ![beowulff](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/beowulff/32/542_2.png) [@beowulff](https://boards.straightdope.com/u/beowulff)\
**Post date:** [December 6, 2008, 2:13pm UTC](https://boards.straightdope.com/t/de-booting-and-re-partitioning-my-mac/475946/2 "2008-12-06T14:13:52Z")

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Looks like it can’t be done on the fly, but here’s a way to do it: [http://www.macosxhints.com/article.php?story=20061025130528687](http://www.macosxhints.com/article.php?story=20061025130528687)