Comments on: Resize Partitions in Mac OS X with Disk Utility

By: peleks

peleks — Sat, 03 Sep 2011 08:46:58 +0000

found out issue, if u want to transfer files instalations to another disk – if ur old disk is for example 500gb and u want to transfer to 256gb ssd it will say – not enought disk space even if ur 500gb disk is filled with 100gb info, u need to resize it first to a size your new disk have

By: peleks

peleks — Sat, 03 Sep 2011 07:58:26 +0000

try to boot with recovery hd and then resize partitions

By: John

John — Sun, 07 Aug 2011 10:40:04 +0000

Use first aid and it should remove the master boot record. It worked for me.

By: Kesari

Kesari — Fri, 15 Apr 2011 05:38:41 +0000

Was looking for some partitioning information and stumbled across this posting. I tried out of curiosity and it works perfectly fine. If we have multiple partition on a disk (internal/external), we need to choose the main disk from the Disk Utility by clicking on the disk and not on the partition and select tab and it works beautifully. I did this on my boot volume (system partition) while running applications without any issue I could partition. But I see that this is not helpful for my situation as this doesn’t let one to grow the partition. i.e. say if one has 100 gb x 3 partitions, we can’t resize and increase the size like, say make one partion 50 gb and use the 50 gb to make the other partition 150gb. But you can free up 50gb and create a new partition to make it 2x50gb and 2x100gb.

By: Ranvir

Ranvir — Wed, 29 Dec 2010 10:58:11 +0000

Yes thats right. Any application cannot be applied to resize the boot volume of the current system. It must be attached as an external hard drive to resize the boot volume. Well , a few days ago I have tried the Stellar Partition manager successfully.

By: Joachim

Joachim — Wed, 20 Oct 2010 13:44:48 +0000

Disk Utility does not let you resize a partition that has a Master Boot Record (MBR). You can see at the bottom of the window in the information if that is the case for your partition. These type of partition are the ones that are used for booting a system.

By: John

John — Fri, 01 Oct 2010 11:29:53 +0000

Did you ever get an answer? I’ve got the same problem and haven’t found a solution yet. Thanks.

By: Jasper van den Bergen

Jasper van den Bergen — Wed, 04 Aug 2010 12:37:08 +0000

I see that the article is almost a year old, but I have a question about this and hope you can still answer this.

My Mac HD is also formatted as Mac OS Extended (journaled), but won’t allow me to resize (enlarge) this partition. I haven’t got a ‘drag’ corner.

It says something about being my startup disc, which isn’t being mentioned in the article.

Is this what causes the problem?