The tag has no usage guidance.

learn more… | top users | synonyms

0
votes
1answer
243 views

How do I install Windows on separate disk using GPT/EFI and BootCamp?

I have a Late 2012 27 inches iMac with an internal HDD (that has a Macintosh HD partition, an EFI partition and a Recovery partition) and an SSD. I installed Windows 10 on using BootCamp Assistant; ...
0
votes
0answers
57 views

Need help fixing hard disk partition map

I have a 500GB Samsung 840 PRO SSD drive. Until recently it was the primary hard disk in my Macbook Pro (late 2011 17"). I got a 1TB SSD which I decided to use as my primary drive instead, and put the ...
2
votes
1answer
49 views

How to create a new partition on FileVault disk on MacOS

I have a 500GB disk on MacOS encrypted with FileVault 2. I have successfully resized the disk to 250GB. Now I want to create another partition to install another MacOS on the 250GB free-space of the ...
3
votes
1answer
1k views

How to fix broken GPT, GUID and unmountable, no type volumes?

I have a Macbook Pro with retina, Yosemite and 500GB hard drive. I tried to install Windows using Bootcamp and accidentally deleted a partition, now my Mac cannot boot anymore. This is the output from ...
1
vote
1answer
41 views

Unable to access neither Partition Layout nor Option tab in Partition tab on Disk Utility

I have a problem that I cannot select Option tab in Partition tab as shown in above screenshot. I wanted to convert my external hard disk to GUID partition table. Thank you in advance for your help.
1
vote
2answers
806 views

Rebuild partition table on external HDD - not writable

I have an external hard drive formatted with 3 HFS+ partitions. To cut a long story short I had it connected to a Windows PC and accidentally started formatting the drive to NTFS. As soon as I ...
0
votes
1answer
2k views

How do I roll back from Yosemite to Mountain Lion without Internet Recovery after erasing my hard disk?

I erased my MacBook Air hard drive - which came with Yosemite OS X - because I wanted to roll back to Mountain Lion (OS X 10.8), since Yosemite was giving me problems with my files from the previous ...
0
votes
1answer
123 views

Can I run a disc image of a cloned Tiger or Leopard PPC drive on a modern Intel Mac via virtualization software?

I have a PowerMac G5 PPC running Tiger and an old, white, Santa Rosa MacBook running Leopard. If I create cloned disc images of these OS drives, will I be able to run them in VMWare Fusion/Parallels/...
0
votes
1answer
154 views

Time Machine Changed My External Hard Drive's to MBR and now I can't access it!

On Yosemite, I was using Bootcamp to install Windows on a part of my internal hard drive. When, bootcamp was finished (before booting into Windows), Time Machine popped up and asked me if I wanted to ...
1
vote
1answer
608 views

Why is a hard drive not readable anymore after removing it from the Mac?

I have a mid 2010 27" iMac. Until this evening it had an SSD (primary drive with OS X Mavericks installation on it) and a HDD as second drive. The HDD is a Western Digital I built into the iMac in ...
0
votes
1answer
5k views

How to fix broken GPT, GUID and unmountable and without type volumes?

I have Macbook pro with mavericks and 512GB SSD i accidentally deleted a partition and suddenly my mac could not boot any more and after i tried to do something with disk utility this is gpt -r show ...
0
votes
1answer
33 views

GUID partition scheme

If I try to change a partition scheme of a 4 partition HDD from Apple to GUID, iPartition warns me that 'system partition' will be erased. What does that mean? Thanks.
2
votes
0answers
27 views

Recovering reformatted partition

I have an external drive that had a single HFS+ partition (GPT). It was accidentally formatted. How can I recover the lost partition? I "know" the old partition map which (coincidentally?) is the same ...
1
vote
1answer
4k views

HD accidentally reformatted to MBR, how to get back to GUID?

So in trying to create an MBR partition of my hard drive which I could then use to boot a solaris-derivative OS using rEFIt, I messed up. Rather than a hard drive with a primary GUID partition map ...
1
vote
1answer
3k views

When is the GUID partition table (GPT) preferred over Apple partition map (APM) for external drives?

I have seagate external portable hard-drive 1 TB, and I will be using with following Mac's. 13" White MacBook (Intel Core 2 Duo) running Snow Leopard 13" MacBook Air (Intel Core i5) running Lion iMac ...