refers to formatting, or erasing a disk, deleting all data on the disk

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2010 Mac Mini Downgrade

I have a 2010 Mac Mini with no DVD drive and a 5,400 RPM hard drive. Of late, it's begun to get quite sluggish, and I'm fairly sure it's the slow HDD that's to blame. I took a look at the means of ...
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2answers
4k views

Error: “couldn't unmount disk” keeps coming up when formatting external HD to eXFat

I have a WD "my Passport" external HD that is currently formatted for a PC and I would like to format it to eXFAT. Every time I hit "erase" in disk util it just comes up with the error "couldn't ...
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1answer
1k views

Failed to make bootable USB drive and now I can't even format it

I want to do a fresh install of Yosemite and I got a brand new 8GB flash drive and I followed this tutorial. I formatted the USB drive and was copying the Yosemite installer, however I got the ...
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1answer
94 views

MacBook 5,1 Upgrade, Leapfrog to Yosemite and MBA Backup

My 2014 MacBook Air was recently stolen, but I have a full backup available via Time Machine saved to an Airport Extreme base station. For now I'm using an old MacBook 5,1 with an Intel Core 2 Duo ...
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1answer
26 views

Tried to reinstall osX and ended up getting folder with questionmark on boot

Today I decided after 6 years to format my MacBook Pro 2009 laptop. Originally I had Snow Leopard on it (I still have an unscratched cd) but in some point back in 2012 a friend installed (using his ...
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1answer
75 views

Apple MacBook Pro 2013 with 512Gb SSD cannot install OS X

I had an issue running an App and the vendor suggested I should revert to the earlier OS X 10.10.3. I located on Time Machine the backup version I needed, waited for the format and restore. I then ...
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214 views

SSD formating trouble and mysterious disks

Two days ago suddenly Apple services started to fail on my Mavericks machine. I couldn't shut down (logind - or something like that - crashed but could not be force-quit). I shut down twice from ...
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1answer
35 views

disk become empty after delete a large file

I have a 2T mobile disk with the format of NTFS. I store 1T files on it, including a large file with the size of 260G. After I delete the large file, all the file was gone. I remount the disk again ...
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0answers
29 views

Unable to prepare any SSDs for OSX installation

I've tried four different SSDs over the last few months, on two separate Macs, and have been unsuccessful in getting OS X installed on any of them. The first was an OCW, the second and third were ...
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0answers
156 views

I get this error when running sudo dd if=/dev/zero of=/dev/rdisk# bs=64k in Terminal

I'm following the steps explained in this answer: sudo dd if=/dev/zero of=/dev/rdisk# bs=64k but get an error dd: /dev/rdisk2: Input/output error 1+0 records in 0+0 records out 0 bytes transferred ...
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0answers
274 views

Waiting for disks to reappear on SSD new install

I just installed a new Samsung SSD 840 PRO in an Early 2011 Macbook Pro, trying to format drive and it is stuck on: "Waiting for disks to reappear" What should I do now?
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How to solve continuing error “internal disk needs repair” after installing a 8 TB HDD in Airport Time Capsule (A1470)

I've replaced the failed 3 TB HDD (SATA 6Gb/s 64MB Cache) with a model number (ST3000DM001) in my TC (A1470) with a 8 TB HDD (from HGST model no HUH728080ALN600). I've used the Airport Utility to try ...
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0answers
30 views

Initialize 6 TB internal hard drive

I've found it both economical and flexible to use a docking station with internal hard drives (the ones that look "naked", i.e., have no plastic casing) for backups. I use this docking station to ...
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0answers
28 views

Windows formatted disks owned by $USER, while Mac formatted disks owned by “root”, right?

I noticed that some disks were owned by $USER and some by root: $ ls -l /Volumes total 88 drwxrwxrwx@ 1 jdoe staff 8192 Jul 14 10:22 USBdrive drwxrwxrwx 0 root wheel 0 Jul 14 15:54 ...
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0answers
22 views

Drive format for Sony Blu-ray

I formatted my drive from my Mac in FAT32. I'm using the drive on a Sony Blu-ray player (BDP-S5500. When I copied my files (movies) to the drive from my Mac, ._ was placed in front of each title and I ...
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42 views

Principal HDD doesn't appear in the list of disks to format

I'm using the recovery tools (from internet), but I can't format the internal 500GB HDD. Entering diskutil list in Terminal I get the following output: -bash-3.2# diskutil list /dev/disk0 #: ...
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137 views

USB key/disk not identified as a storage device

I have a 64GB USB key that I suddenly can do nothing with...I've tried both Mac and Windows diagnostics, as described below. At this stage I don't mind losing its data (99% of which was recently ...
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28 views

Multiple images in Pages document

In a document created by Mac Pages, I need to insert three pdf files as different chapters. As it is not possible to insert them by a single command, I had inserted every page of these documents like ...
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0answers
58 views

Clone whole partitioning scheme to smaller disk

I have the following on my secondary disk. As I am not satisfied with it I would like to clone everything to the other one which is smaller unfortunately. /dev/disk2 #: TYPE ...
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0answers
2k views

The disk you inserted was not readable by this computer

I am getting a system message from Mac OS x 10.8.2 every time I power on my ICY DOCK RAID enclosure. I have followed the procedure in the manual to the letter. Installed two new 2TB HDDs > Changed ...