I installed Windows 8 on my MacBook Pro using Boot Camp. Now I've figured out I should have made the Windows 8 partition bigger. Is this safe to attempt using Disk Utility? If not, how do I go about accomplishing this?

  • I have used Disk Utility for this in the past, so if you need a free option it is "possible"—but I don't think I'd call it "safe". Definitely have a backup ready and waiting (although you should anyway, and resizing partitions is always somewhat dangerous). Do NOT under any circumstances resize from within Windows, as this WILL kill everything. – Wowfunhappy Jun 13 '17 at 19:22

Though grgarside's answer was the correct & only correct answer at the time, iPartition is no longer the 'go to' app for this kind of task. It has unfortunately been left to languish & can't handle CoreStorage volumes at all.

The only replacement - & actually improvement - on iPartition is now Paragon Hard Disk Manager

It can not only resize Bootcamp partitions, it can fix them & even back up or move them to a new drive without breaking anything else in the process.

Full feature list here - https://www.paragon-software.com/home/hdm-mac/features.html

no affiliation, merely a satisfied user.

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For all my partitioning, I use and recommend iPartition.

You can use iPartition on drives that contain Boot Camp volumes; in fact, you can even resize your Windows partitions, and let iPartition take care of reconfiguring the Windows boot process for you.

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