OS X :: External HD Shown As 'read Only' On Mac?
Apr 15, 2009
i have a sony vaio external hard drive, and i formatted it using my PC, and it worked perfectly fine - i can read / write files to the HD.
however, it was shown as a 'read only' HD once i plugged it to my Mac.. i even tried it with my friend's Mac and the same thing showed.
i tried to repeat the formatting and plugging with both my PC and Mac over 10x time and it's only giving me the same result.
does that mean my mac is not compatible with the HD?
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Oct 14, 2008
How can I reach the files on this HD, is there an app that can do more than DiskUtility? For starters just to see the drive?
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Mar 27, 2008
I have successfully connected a couple of times to a firewire external hard drive connected to my dad's iMac over the internet (AFP server) for the purpose of backing up some files, but now it doesn't show up at all as a volume when I connect to his iMac through finder/go/connect to server. I don't believe that any settings were changed, so don't understand why it isn't showing up. Currently when I get info on the drive 'shared folder' is checked, everyone has permission to read and write and 'ignore ownership on this volume' is checked and file sharing is enabled in system preferences/sharing.
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Jun 18, 2009
I have a Western Digital External HD and am using an emac computer. I left my hd plugged into another mac for a week while I was on vacation, it was working fine. When I got back it was not showing up on the computer, and would not show up after I unplugged it, restarted, etc. I thought maybe it was the computer, but it will not show up on mine either. I cannot be sure the hd was not dropped, but I was told that it was not dropped. Anyway, it turns on when plugged in and makes noises like it's working, and the lights are on. It just does not show up on my computer. My friend said this is probably a case problem, but I don't know what to do in general about it.
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Oct 19, 2010
I have a lacie firewire external hardrive. It's not showing on my mac when I plug in the firewire cable. When I put the usb cable in it shows right up. Now, when i connect the firewire cable to a friend's mac it shows right up.
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Apr 29, 2012
When I connect an external harddrive to my Macbookpro it does not show on Finder, Diskutil (but the hdd disk starts). USB works fine. If I plug in FW when computer is shut down or sleep it works fine. Cant find out why. Tried with different cables and disks.
Info:
MacBook Pro (15-inch Mid 2010), Mac OS X (10.7.3)
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Jun 22, 2009
Went and did the bootcamp thing and installed Windows 7. I tried to connect my HD external via firewire, but it would not show up in Windows. This is after I did a backup of my mac to time machine. Will it work after time machine backup?
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Oct 30, 2010
I'm not sure if this qualifies as a hardware issue or a software one. I recently swapped out from a PC to a iMac. I wanted to keep all my old files so I pulled out the internal HDD and placed it in a HDD Enclosure and connected it via USB 2.0. Now the Mac recognized it and all seemed well, but a hidden folder I need access to doesn't show up on my drive. If it helps, this drive was the master drive on my old PC and the file I'm trying to locate was on the desktop.
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Jun 27, 2008
I recently purchased a 500gb LaCie hard drive to use as as extra storage for media, not necessarily for back up purposes. I cannot seem to find it either under disc utilities or in the finder window. Has anyone had this issue with a hard drive and if so any suggestions?
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Jun 9, 2008
I have a Macbook (blackbook) running OS X 10.5.3 and a 160GB Firelite HD that connects via USB. It use to show up and run just find but lately it hasn't been showing up on the desktop or in Finder. However, it shows up in Disk Utility, which shows that nothing is wrong with it. How do I get it to show back up on the desktop/finder?
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Aug 12, 2010
I have an external Transcend HD, which has been working perfectly fine for around 5 months now. It is NTFS, and I use NTFS-3g and Macfuse. Been running fine. Was able to read and write. Suddenly I am only able to read though. I go into the "Get Info" pane and the option to choose whether I want to read and write, or read only is gone, and all that it says is "You can read only". getting this back to read and write is really appreciated. I really need this disk.
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Oct 28, 2007
So my entire iTunes library (about 200 GB) is on an external HD.
After I installed Leopard it's showing as Read Only. There is not option for permissions and in Disk Utility all I can do is verify the disk.
Obviously I can't delete or add files or do anything but read them.
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Mar 29, 2009
I got a macbook pro and a My Book 1tb. Want to finally put away my old PC (which is running only on UBUNTU) away but I need to get the files off my PC onto the My Book. Well after setting up the time machine and what not I move the HD & connect it to my PC & attempt to drag files onto it. Says it's read only. Tried changing the sharing options to read and write for everyone on my mac. Still the same. Used disk utility to wipe clean the entire HD. Still read only. Posting this on Ubuntu forums but I'm positive the problem is on the Mac.
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Apr 16, 2010
I recently purchased this external hard drive. I transferred several GB of movies/TV shows/music onto it from a Windows 7 PC. Now that I've hooked it up to my Macbook (10.6.2), it shows up as read only.
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Jul 6, 2009
I am sure this is a simple question, but I am having a problem going from windows to mac with an external hard drive. I can read and write to the drive on any windows PC. On my macbook pro laptop, I can only read. It will not let me write or erase anything to the drive. Does this have to do with the drives formatting? If so which format will let me both read and write on mac and pc?
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Dec 8, 2009
Before you peek into this topic to say "OS X can only read NTFS, not write to it", save the effort; I already know that. I have a 1TB WD MyBook Studio. I partitioned this drive into 2 parts, an Mac OS Extended partition and, using Win 7, an NTFS partition. Now my MBP can mount and see its partition just fine, but it refuses to mount the other NTFS partition, seeing it in Disk Utility as MS-DOS (Fat) format with a weird name. How do I get the MBP to mount the NTFS partition?
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Dec 29, 2009
Every time I reboot my computer my external drives are all set to "read only". I have to eject them, and remount them and things are then fine again, but this is an annoying step and the fact that a reboot is causing them to switch to read-only is having me worried.
Anyone else have this problem/know of a solution?
I've been trying to figure it out over at the official apple forums but we're not getting anywhere... the thread is here:
[URL]
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Mar 20, 2010
I bought an Iomega Prestige 1TB external harddrive a couple months ago with it running off my Macbook Pro.
I just flew down home for spring break, leaving my Macbook Pro charger at school. However, I do have the harddrive with all my backed up files. The problem is, my PC laptop (Dell, Windows XP) does not recognizes it. When I plug in the harddrive and turn it on, the computer recognizes that there is something plugged in (it gives me the option to safely remove hardware), but there is no sign of the drive anywhere.
Is there anyway my PC can read/recognize it?
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Apr 11, 2010
I've got a simpletech 2tb hard drive which I've used for time machine, but all of a sudden it won't read when I plug it in. I can hear it power on when I plug it in but it won't show up. I've tried plugging in other devices to make sure the ports are still good and tried restarting with and without the hard drive plugged in. I've only had this hard drive a week and haven't done any improper device removals to it. Also, I am running snow leopard with all the updates.
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Jun 9, 2010
So I have an external drive that I want to be able to copy some files to. I use it for my Windows PC, and i have some of it set up for time machine too. When I plug it in, Documents, Pictures stuff show up. I can drag files off onto OS X but I cant drop other files on it. It says I only have READ permissions. How do I change this? Fully updated OS X SL.
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Jun 19, 2010
How do I format an external HDD to read/write on a mac osx running snow leopard, and also let it be able to be readable on windows vista/7?
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Jul 17, 2010
My hard drive was filling up, so I decided to try and move my music over onto my external. I thought I could do it without reading any guides and I ended up in a royal mess. I now have the folder Music/iTunes/(Album Artwork, iTunes Library, etc) copied over onto my external.
I have completely uninstalled iTunes from my computer, and my internal hard drive has the user/music folder clear.
What is the easiest way to have my iTunes reading my music from my external? I would like to keep playlists and playcounts if possible.
I am on a computer with Mac OSX 10.5.8.
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Aug 6, 2010
I have a portable external hard drive formatted for mac and I want to be able to view my movies that are on it through my games console. I believe both consoles only read Fat 32 so what are my options to get the consoles to read the HD?
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Apr 8, 2012
Permissions are greyed out, and Disk Utility says Owners Enabled: No.
Tried: "sudo chown root:admin" from terminal, with this result: "Read-only file system"
Info:
iMac, Mac OS X (10.6.8)
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Apr 12, 2012
i just bought a mac mini and everything seems to be running great. however, i plugged in a 2TB drive i used on my Windows 7 laptop and whenever i try to delete or add a file i get an error saying the drive is 'read only'. i've plugged in a USB thumb drive and this works fine. is there anything i can do?
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Nov 22, 2010
i want to ask if the tv with usb port can read the external HD formatted by mac (hfs/hfs+) in playing movies?
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Dec 27, 2010
I just got hit with a double whammy. :Imac running Panther did something odd to the it's external drive. That was formatted fat 32. I plan to see if anyone in the nearby computer repair class can recover those files, but in the meantime (days!) the gremlin also hit the macbook, putting it in range of a spill. So now the only backups I have are on the second external drive formatted with a mac format on the macbook. This one was done with 2 partitions, one for Time Machine, one for the stuff I was yanking over from the other hard drive.
So now I find that Imac can't even SEE the second drive. (Not that I expected it to see or recognize Time Machine, just the other part.) My macbook is on downtime until it gets checkup/cleaning (with all mac places nearby apparently closed thru New Years and classes I need it for starting right after) Does anyone know a way to get "Ye Old Imac" to see the other drive? Is there a driver or something? I know it's very hard to find older software (most online sites don't go back past Tiger), but it is a mac format for goodness sake! I can't even be 100% sure if it's something to do with a newer mac format for the external drive or "Ye Old Imac" is just being grumpy. It seems to see the other USB stuff but it has been known to lose touch with them.
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Aug 23, 2007
I have an external hard drive, it's formatted in NTFS, sort of like a 'bridge' between my Macbook and my Windows machine. I was able to write to the NTFS drive from my Mac using MacFUSE and NTFS-3G. A few days ago, the hard drive showed up as 'read-only', and is still that way now. I've tried repairing disk permissions, reinstalling the NTFS applications, nothing seems to change the write permissions back.
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Nov 13, 2008
Just about to format my external harddrive as its read only at the moment (only adjustable on a Windows machine).
I've opened disk utility and chosen my external HDD from there... my question is, which format do I use? Theres about four appearing:
Mac OS Extended (case sensitive)
Mac OS Extended (case sensitive, journaledd)
Mac OS Extended
Mac OS Extended (journaled)
Which one do I choose and why?
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Aug 29, 2009
I installed snow leopard and now my permissions for my external drives (mac formatted) are now read-only. It wont let me change the permission, or change owner, even when I go through root account (regular account is an admin).
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