USB Flash drive will only work on the Mac

I have a Toshiba 32 GB flash drive and tried to copy music to it. The music plays thru my Mac but when I put the drive into my Subaru or Sony amplifier I get the message that the drive is unrecognized. I tried to partition it with the same results. Is there a certain partition to use? I have tried all that were offered in Disc Utility.

From a subaru forum "Zero problems using 16gb SanDisk Cruzer USB 2.0 Flash drives in whatever head unit is in a non-nav"
It may depends what head unit you have, same for the sony amplifier, many units cannot read over 8 or 16gb, try a different / smaller usb and give it a go. Also maybe try formatting your stick at work or a friends computer to fat16

Similar Messages

OS X lion USB Thumb Drive - will this work on new Mac Mini or MBA (2011)?

Hi All,
Not to be confused with the other similar posts, I am interesting in only clarification of what build comes with the USB Thumb Drive now available on Apple Store - will this work with new MBA and Mac Mini?
Thanks,

KeanuReeves wrote:
From what I have read about the usb installer, it is not intended for you to try booting from the stick after wiping your hard drive. You are to click on the installer
You may be correct, but this statement is quite confusing in that context:
Important Note
When you install OS X Lion using the USB thumb drive, you will not be able to reinstall OS X Lion from Lion Recovery. You will need to use the USB thumb drive to reinstall OS X Lion.
So, if the Thumb drive is supposed to take the part of the Recovery partition, it seems that it should be able to boot. However, the license agreement still requires an Apple computer running Snow Leopard, so maybe it isn't bootable.

My flash drive will not connect to my Mac. what should I do?

My flash drive will not connect to my Mac. What should I do, and how should I fix this?

I could not save the data in time, so i just had to deleat every thing on the flash drive.

USB Flash Drive: Read-only filesystem

Hi
I'm trying to format a usb flash drive using various tools but they all say that it's a read-only file system. The drive is not mounted and I'm running as root. If I try to mount the drive like so with the command
sudo mount -o rw,users /dev/sdc1 /media/myflashdrive
I don't get any errors and when I go to /media/myflashdrive I can see and edit all the files (only as root however). However, any changes are not persistent. For example, if I delete any files or run
sudo rm -rf /media/myflashdrive/*
it seems to work and ls doesn't show anything, but then if a reopen the drive, the files are back.
I've tried this on other computers and even in Windows but nothing can put a scratch on it. I heard something about there being a certain bit in the first sector which can be flipped to make a drive read-only but I think it only applied to Windows.
Any advice would be greatly appreciated, but if I can't format the drive I'll probably use some thermite to toast the data on it.

Hmm. I wasn't very clear: my drive was usable originally but it stopped working while I was using Windows (I just plugged it in one day and it was read-only) and now that I use Linux I thought I'd try to fix it (I have been told that linux can do anything but I'm not so sure). I suppose it could just be a physical error on the drive but it's not got any marks or anything.
Just a thought here, if it was a physical problem, would it be possible to 'reset' it with an electromagnet or by shorting it out or would this just frazzle the chip? Maybe not the right forums for that kind of question.
Last edited by JJ.Eastwood (2011-05-26 19:50:56)

USB flash drive 'Read only' problem

Hi everyone,
I have a Trescend USB flash drive 16 Gb, and when I plug it into my desktop (using windows 7 64 bits) I'm able to write or read any file I want. When I plug it into my mid-2010 MacBook Pro 15' w/ lastest version of OS X Lion, the permission are 'Read Only' and I can't seem to be able to change the permission.
How am I suppose to change permission on my Macbook ?
Thanks in advance,
Cheers,
François

I installed it and got this error : now my Macbook wont even see the flash drive...

Usb flash drive v240w stopped working

Hi....... i have a hp usb flash drive v240w that had stopped working..????
tell me what i can do to make it work again... or what i have to do for replacing it..

johnl927 wrote:
If it was mounted to a system and not ejected correctly you might have messed up the boot record and mount point, if you can see it Disk Utility then the mount point of that drive is bad, you have to reformat it.
Mr H might have ejected it incorrectly (without doing the command E thing) but really I doubt it.
Not quite sure what you are saying here: since we DO see it in DU (where it says not mounted) then there is no way even to look at what is on the drive (the number of files and used space shows up in DU as well) and all I can do is reformat it?
I attached a good, working flash drive and it too shows up in DU, but it indicates where it is mounted (volumes/... if I recall) so I don't get what you say above where I underlined it.
Originally drive was formatted as MBR I suspect, being Sandisk.
I've never bothered to reformat the flash drives from their original formatting in the past - I use several and never have I had this problem.
As long as I have to now, what format do you suggest?
Thanks,
Mrs H

Is it true that Mountain Lion will only work on the latest (within the last 3 years) Macs?

I have read somewhere that the developers version of Mountain Lion would only work on the latest Macs and I was wondering whether the soon to be released version will be the same.

They have published this list of compatible machines.

Usb flash drive read only problem [solved]

Hi, im using spacefm, i have udevil and udisks2 installed, i can read my USB flash drive but i cannot delete files, i tried gparted that use spacefm as well and i can delete files from the usb flash drive with no problems, any ideas?
i solved i installed ntfs-3g and i can delete files again
thanks
Last edited by adcdam (2013-04-08 01:01:22)

I installed it and got this error : now my Macbook wont even see the flash drive...

Usb hard drive will only alow me to copy from it not edit

this is my first mac and ive only had it for about a week but i pick up on computers very quickly, i have a usb hard drive that i have used previously with PC's the drive in it was pulled from a PC laptop nd formatted it but when i connect it to my mac it will allow me to view and copie the files but not edit or delete them.
i would be grantful for any ideas thank u in advance
scipio
mac book pro 2.0ghz Mac OS X (10.4.5)

Note that you cannot just reformat the drive. You must re-partition the drive. Open Disk Utility and select the drive entry (the one with the mfgr.'s ID) from the leftside list, then click on the Partition tab in the DU main window. Select one partition from the dropdown menu. If you want to use the drive to boot the MacBook, then click on the Option button and select the GUID partition scheme from the dropdown menu. Click OK, then click on the Partition button. Wait for the volume to mount on the Desktop, then quit DU.

Adobe Flash Player Will Not Work with Safari Mac OS 10.9.2

I have tried numerous times to install Adobe Flash Player for Mac OS 10.9 and get Plug-in error when I try to run it. Before the suggested update, Flash Player ran fine. I would not have tried the update except the files on the web site that I am usinf had a symnbol statiing that the later version of Flash Player was required for it to run.
I did what Adobe suggested and removed the plug-in and then reinstalled it. Still does not work. When is Adobe going to fix it? I think it was not well researched before the release, and it definately has compatibility issues with Mac OS 10.9 Mavericks
Thanks,
Fred

Hi Mike M,
Thanks for the quick response. It worked OK after I did this, and I alerted other users in my MUG just in case they have a similar aged Macs. I hope that the fix for this will be automatic in the next update.
Fred Crowder

I burned a DVD of photos but it will only work on a Mac.

I copied photos (jpegs) from a flash drive onto a DVD-R disc. Then, I used disk utility to create a disk image of the DVD and burn a copy of the disk image onto another DVD-R disc. Both discs work in my computer (running OS X 10.9.4). However, the 2nd disc that I burned using disk utility isn't working on a PC. The PC says that there is a disc waiting to be written when I try to open it. But I can open it and look at the pictures on a macbook. Any thoughts on how to make this readable on a PC?

If you burn a disc with Finder
<http://support.apple.com/kb/ht1152>
it should be Mac and Windows readable disc.

MS Word crashed and now my USB/flash drive doesn't work.

My MS Word crashed and when it recovered I got an alert saying my USB was not ejected properly (even though I didn't eject or remove it). I then removed it and put it back in and now my MacBook Air won't read it at all, and when I try it on a Windows laptop it says the drive is empty.
Please help! It has all my uni files on it!
Thanks so much.

Try plugging it into your MacBook and then repairing the disk permissions using Disk Utility.
Repairing a disk's permissions using Disk Utility.
Note: This should not delete any information or files from the disk.
Repairing a disk's permissions can help solve various file-related issues.
To begin, make sure your external disk that you are repairing is connected to the computer. If you are repairing an internal disk, skip this step.
After the drive is connected, launch the Disk Utility application in any of the following ways:
Type the first few letters of its name into Spotlight. Select it from the results.
Go Finder > Applications > Utilities > Disk Utility
Go Launchpad > Utilities > Disk Utility
Once you are in the Disk Utility app, select the external drive from the sidebar on the left.
Then, choose the Repair Disk Permissions button on the right.
If this does not solve your issues, you may have no choice but to reformat the drive using Disk Utility.
Austin

My USB flash drive, which has worked before, isn't recognized by my Mac anymore. How can I recover data on it?

Help, please?

I've found multiple data recovery programs, but Iäm wondering if they might just do some damage and whether they're reliable?

I have a Cinema Display M8149. Will this work with the Mac mini?

I have the first generation of Cinema Display M8149 and it is still working beautifully! I need to upgrade now my first gen G4 and I am wondering if I buy a mini will the display work with it? If yes, do I need to buy the newest mini or could I buy a used or refurbished older mini and have the monitor still work. What adapter would I need? Thank you!

This
http://en.wikipedia.org/wiki/Apple_Cinema_Display
says the M8149 has the ACD connector (Apple Display Connector)
The ACD looks like:
http://en.wikipedia.org/wiki/Apple_Display_Connector

USB flash drive defined as boot device but not visible by the boot driver.

I have installed Mountain Lion (10.8.2) over Lion a few days ago. In the follow-up operations, I tried to create a USB flash drive recovery device, using methods widely advertised over the web. I first tried this with an 8 GB "Kingston DT 101 G2" device. The creation of the device either manually through the use of the Disk Utility or using a small utility called Lion DiskMaker 2.0.2 worked OK.
However, after setting the resulting device as the boot device through "System Preference", it never booted on it, but instead on the normal system disk. Conversely, when booting with the option key depressed, I could only see as option the normal system disk or its recovery partition, but never the USB flash drive, although it was present.
After numerous tests, through the so-called "trial and error" method, I eventually found out that I obtained perfectly bootable USB devices with either a generic device seen as "USB 2 USB Flash Drive" by the disk utility, or with a "Kingston Data Traveler G3" USB flash drive (both being 8 GB devices).
Now, I can understand that, for whatever reason, some USB devices, although formatted as boot devices, will not be seen by the boot driver. But, in such a case, it is a serious issue that "System Preference" accepts to set them as boot devices. I would suggest that "System Preference" tests whether the boot driver is able to see them and, if not, issues an error message instead of accepting them as boot device.
I also have an unrelated side question: when restoring a disk through the Disk Utility, is the resulting new volume defragmented and compacted by the process or not?

I can only tell you that some USB flash drives don't work as expected on Macs, and I don't believe it is specifically related to the product since they often work for others. I have five flash drives from a particular manufacturer that when plugged into one of my computers are not recognized, yet they are on all my other computers. I have six or seven older ones from the same manufacturer, same model, that work fine on all my computers. I have two Kingston Travelers that would not work as a bootable device on any of my computers. Many other users here have had issues with San Disk flash drives.
I don't know if this helps any, but at least you can know that you aren't alone.
One thing I can suggest is when you prepare a new flash drive that you go through this process:
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
This may fix boot problems with new flash drives because they are often prepared by the manufacturer with NTFS. To fully clear the drive you must both partition and format the device. Writing zeros has in some cases helped make a drive bootable when at first it was not.

USB Flash drive will only work on the Mac

Similar Messages

Maybe you are looking for