Hot answers tagged

32

The encrypted volume's password is not required for erasing the disk, only to mount the encrypted volume on the disk. It's unclear whether you're being asked for the password only when connecting the disk, or when you attempt to erase it. In Lion, you can use Disk Utility to erase an encrypted volume, but not in Mountain Lion. However, you can erase the ...


29

I don't have numbers to back up the statement, but using HFS+ non-journaled is a good idea in certain volumes that require absolute speed, without worrying (too much) about a possible "data loss" or "data corruption" in case of power failure or similar. When is using HFS+ Non-journaled a BAD idea? External (USB, FW, ESata) drives that are connected and ...


23

From Apple's MacBook Air: Frequently Asked Questions about Software Reinstall Drive: Note: The MacBook Air Software Reinstall Drive is read only. You cannot erase it, reformat it, or reuse it as a general purpose USB storage device. Honestly, thumb drives are dirt cheap these days—why would you want to lose your only way to reinstall your OS?


22

There isn't any advantage to wiping and reinstalling OS X on a new Mac direct from Apple. You'll end up with the exact same drive contents. I can't think of any difference between an Apple-imaged Mac and a self-imaged Mac.


20

Use the default (case-insensitive) unless you both a) know what you're doing and b) you absolutely have to. There are several programs (Norton Antivirus comes to mind) that won't work properly on a case-sensitive file system. HFS is, by default, case-insensitive but case-preserving (i.e. it doesn't care what you type for comparison purposes, but it will ...


14

There are several disadvantages: Most internet posts describing how to reinstall OS X miss the hardware specific diagnostic boot image that is stored on Recovery HD. You will lose the iLife apps if you don't first boot the factory OS and claim those redemptions to an Apple ID. The recovery boot isn't a deal breaker if you don't mind using a generic ...


10

If Apple's supported method of using the createinstallmedia tool doesn't work, you can try other options below: https://support.apple.com/en-us/HT201372 Really - try the above if you can, but as an alternative, here is a simple recipe for making a USB version of the OS X installer + associated tools. (Migration Assistant, Disk Utility, Network Utility, ...


10

If your goal is to completely wipe all data which is on your current boot disk, then follow the procedure below. Insert the Mac OS X CD. Restart the computer. Immediately after the startup sound, press and hold the "C" key to start up from CD. When the Installer screen appears, do not click Continue. Instead, choose Installer > Open Disk Utilities. ...


8

I'd say a full format is almost never necessary, though the only thing you'll lose is time. I've got an OS X install that I've migrated from computer A to computer B to computer C and back to B and upgraded from Tiger to Leopard to Snow Leopard (all upgrade-installs, no reformatting or anything) over the past 6 years and it works great.


8

diskutil list In my case I wanted to format the parition as NTFS for installing Windows 7 on it. The last parameter is the partition 4 on first disk. diskutil eraseVolume "Tuxera NTFS" my-ntfs disk0s4


8

The easiest way is as follows: You will need the original (or a newer) Mac OS X install disk for the computer. Do not use and older version than originally came with the Mac, and do not use the install disk from any other model of Mac. Insert the disk and restart the computer pressing the Option key as it restarts. After about a minute when it loads, click ...


7

Best way to keep it running smoothly is avoiding installing shady software and most of all be very careful if you want to install some cracked stuff. Keep your hard drive checked and from time to time verify it for errors (Disk utility -> verify) and fix them if needed. That's what I do to keep my computers (no matter what OS safe). Just for the ...


7

The built in “Erase all Content and Settings” function (found in the Settings app, under General → Reset) should be sufficient in virtually all cases. The 3GS and later iPhones, 3rd generation and later iPod Touches and all iPads use hardware encryption, where all data is stored encrypted in their flash memory. On these devices the wipe function simply ...


7

OS X can default read NTFS disks, but not write to them. Possible solutions/options: NTFS for Mac OS X (10 Days Trial): I use this one, and it does the job very well. When the driver is installed, you format your NTFS disks with Disk Utility where you select Windows NT Filesystem as the format. Tuxera NTFS for Mac (15 Days Trial): I haven't tried this ...


7

Buy a USB flash drive that uses hardware encryption, where the unlock mechanism doesn't depend a software client, then format it however you prefer. An example of this would be a USB flash drive with a a biometric sensor which can scan a finger, or a built-in keypad where you can enter a PIN to unlock the drive. Several vendors sell hardware encrypted flash ...


6

By default, HFS+ in OS X is case-insensitive. You have to specifically erase a partition and select case-sensitive for a partition to be case-sensitive. It's not that common, but there is software which requires case-insensitive HFS+. It's more common for legacy software to require case-sensitive HFS+. Of course, software should work on both, and most newer ...


6

VideoLAN's VLC is the way to go here, I haven't found a movie file that it can't play.


6

As long as the drive connects to your MacBook Air via a connection protocol that the Air supports like Thunderbolt or USB 2 or USB 3 you can format the drive and use it with your Mac just fine. To format an external hard drive on your Mac (paraphrased from here): Connect the drive to your Mac Open Applications > Utilities > Disk Utility On the left ...


6

The next time you have your USB stick plugged in, open up Trash in the Finder, and you'll see the items that you have deleted in the trash. So, although you are "deleting" files from your USB stick, they are still there, and taking up space. You need to delete the trash when the USB stick is plugged in. This will solve your problem, as long as you remember ...


6

Hold the option key when you power on and you can choose the working mac partition or insert a bootable DVD to get back to disk utility or a working os. This is called the Startup Manager screen. The eject key will work once the Startup Manager is running so you can eject the windows DVD. As I didn't explain the option key - here is a great article ...


6

Time Machine is documented well at http://support.apple.com/kb/ht1427 and this discussion goes into sparse bundles and file vault so it's worth a read http://discussions.apple.com/thread.jspa?threadID=1447315 Since backups to an attached hard disk are written as plain files - that would be easier to connect to a non-Mac system. Backups to a Time Capsule are ...


5

One or other can break applications, case-insensitive is the default however. If you've been using case-insensitive without issues then there are no guarantees that a transition to case-sensitive will go well. Here's one example from the apple support pages: ...don’t assume your third-party software solutions work correctly with case sensitivity. ...


5

According to this answer, you can use exFAT if your version of Mac OS X and Windows are new enough. That would be at least Mac OS X 10.6.5 and Windows Vista SP1.


5

Normally from the command line, you would use the diskutil command with the zeroDisk, randomDisk or secureErase options to securely wipe a disk. However, I would imagine this doesn't work on the disk you've just booted from. So I suspect you'll either have to find another Mac and connect yours in target disk mode via a Firewire cable, or physically remove ...


5

I've struggled for some days with the same problem but now it is solved. The problem was a faulty SATA cable. I've replaced it with a new one and now everything works as expected.


5

Neither OS X nor Windows have on-board tools to read their mutual encrypted file system (FileVault2 / BitLocker). The only solution I found so far is using a third-party tool: BitLocker: Dislocker This software has been designed to read BitLocker encrypted partitions under Linux and Mac OSX systems. Third party file system: LaCie's Private-Public ...


4

You could try VeraCrypt, which is a fork of the now-defunct TrueCrypt. This will let you encrypt the whole device and make a Fat32 or NTFS partition inside the encrypted volume. It supports OS X and Windows.


4

Before you're able to create a bootable OS X installer, you'll need to do the following first: Download the OS X Installer app from the Mac App Store. Mount the volume you want to convert into a bootable installer. This could be removable media such as a USB flash drive, or a secondary internal partition. You can then use the createinstallmedia tool to ...


4

Optimal is what it's formatted as when you get the machine. GUID/HFS+ LVG/Core Storage is necessary if you ever enabled FileVault. [Some updates to Yosemite also seem to have triggered that conversion too] Try Blackmagic Disk Speed Test to see what speeds it's actually achieving.



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