Flash drive not playing in car audio system

MP3 music downloaded on to a SanDisk Ultra 32G 3.0 flash drive (recommended by Vauxhall) does not play in the car audio system. Being new and under warranty, I took this issue to a Vauxhall dealership. Fault finding revealed nothing wrong with the car audio system. However, when the technician downloaded music from my flash drive on to their computer then downloaded from their computer to their identical flash drive it played in the car audio system. It appears the car audio system does not like anything downloaded from my Mac. Any ideas how I can get my music to play in the car?

iMac 21.5″, macOS 11.7

Posted on Aug 31, 2023 11:17 PM

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Question marked as Top-ranking reply

Posted on Sep 3, 2023 11:28 PM

As you obviously understand this and I have no idea here is the result:

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DOT_CLEAN(1)              BSD General Commands Manual             DOT_CLEAN(1)

NAME

     dot_clean -- Merge ._* files with corresponding native files.

SYNOPSIS

     dot_clean [-fmnsv] [--keep=[mostrecent|dotbar|native]] [dir ...]

DESCRIPTION

     For each dir, dot_clean recursively merges all ._* files with their cor-

     responding native files according to the rules specified with the given

     arguments.  By default, if there is an attribute on the native file that

     is also present in the ._ file, the most recent attribute will be used.

     If no operands are given, a usage message is output.  If more than one

     directory is given, directories are merged in the order in which they are

     specified.

OPTIONS

     -f      Flat merge.  Do not recursively merge all directories in the

             given dir.  This is off by default.

     -h      Help. Prints verbose usage message.

     -m      Always delete dot underbar files.

     -n      Delete dot underbar file if there is no matching native file.

     -s      Follow symbolic links.  This will follow symbolic dot underbar

             files when they are found.

     -v      Print verbose output.

     --keep=mostrecent

             The default option.  If an attribute is associated with a data

             fork, use that.  Otherwise, use information stored in the Apple-

             Double file.  Note that the native fork's data is preferred even

             if the data in the AppleDouble file is newer.

     --keep=dotbar

             Always use information stored in the AppleDouble file, replacing

             any extended attributes associated with the native file.

     --keep=native

             Always use the information associated with the data fork, ignor-

             ing any AppleDouble files.

EXAMPLES

     The following is how to do an dot_clean merge on the mounted volume test,

     always using the dot underbar information.

           dot_clean --keep=dotbar /Volumes/test

DIAGNOSTICS

     The dot_clean utility exits 0 on success, and >0 if an error occurs.

BUGS

     None known.

BSD                              Sept 27, 2012                             BSD

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39 replies

Sep 2, 2023 9:16 AM in response to JohnA50

Odd. Your Mac should be able to format it using DiskUtility. I've done flash drives, external drives. Just checked and DiskUtility gives me option for MS-DOS (FAT) or ExFAT.

Find another/Windows computer?

Might be an issue with the drive?

I just remembered a few years ago in my Hyundai I used an Mac formatted USB drive just fine when my iPhone was having Bluetooth issues.

Good luck!

Sep 3, 2023 2:09 AM in response to JohnA50

dot_clean is a command-line tool. If you look in the Utilities folder, inside the Applications folder, you'll find an application called Terminal.


If you run that application, it will create a terminal emulator window, inside which is running a shell. A shell is a command-line interpreter. You want to be careful about what you type into the command line, since Unix-style commands can be very powerful, but also have complicated syntax that can trip up people not accustomed to working with Unix or Linux.


Sep 4, 2023 2:05 AM in response to JohnA50

Your version of the dot_clean command does not accept a ‘r’ flag; it does the recursion by default (in the absence of a ‘f’ flag).


Looks like dot_clean itself is identical in Big Sur and Ventura - and slightly different from dot_clean in some older versions of macOS (versions that supported the ‘r’ flag but almost certainly not the ‘f’ one).

Sep 4, 2023 4:50 AM in response to Servant of Cats

I have no idea what the car stereo chokes on. Removing items whose names end in .MP3 would remove the music as each tune is an MP3. As I have indicated in several posts there are three items that I can see on the flash drive other than the music; .fseventsd, .Spotlight-V100 and .Trashes. None of the commands recommended by any of those who helpfully replied did anything to solve the problem.

Sep 4, 2023 6:23 AM in response to JohnA50

"We can do without the accusations. I need solutions"


Okay, here's the simple answer. There is no solution. All the responses elaborating the inner workings of macOS do little to help. Even if there is a solution it may so complicated as to not be worth it. Live with it or buy a cheap Windows computer if it's that important to you. Macs do things differently than Windows PCs. If the developer of the audio system in your automobile didn't care to think about it being compatible with Macs filesystems then, well ,thats it.

Sep 2, 2023 12:06 AM in response to javaliga

Thanks for replying. Pressing 'command+shift+.' I see three folders placed on the flash drive; .fseventsd, .spotlight-v100 and .Trashes. Moving them to the bin and emptying the bin causes them (except .Trashes) to disappear. However, eject the flash drive, plug it back in and open it the folders are still there.


For the million dollar questions; how do I get rid of these and prevent Mac from placing them on the drive?

Sep 2, 2023 2:25 AM in response to timothylance

Thank you for replying. When I say car audio system I am referring to the infotainment system that is part of the car. Perhaps I am misunderstanding you but I am not concerned with Mac being able to read Windows. Putting music from the Music app on my Mac should be nothing more than drag and drop to the flash drive and nothing else then plugging the flash drive into the USB slot in the car infotainment system.

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Flash drive not playing in car audio system

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