External CD reader not recognized, why?

I have a new Mac mini, which does not have a cd drive, so I attached an external cd reader. The operating system does not recognized this drive unless I restart the mini, why. My old mac mini had no problem recognizing that external cd drive. Is this a "feature" of the mountain lion operating system, or some fault of the computer?

I'm new to this forum, so I don't know where that comment was posted.
To the point, I was trying to load a new program into my computer from a CD. Since the new mac mini's don't have internal CD readers, I attached an external one via the UBS port. Upon inserting the CD with the program on I wanted to load, the CD reader light came on for a couple of seconds as the reader started, than nothing. I decided to restart the computer, at which point, the drive was recongized and was able to load the program on the CD. I just tested this again, and the CD reading is being recognized by the computer now.
So, that brings up my next question, does the operating system need to "learn" about each new attachment? I'm having a similar program with a printer. I didn't have this issue with my prior mac mini and OS X (v. 10.7...).
Being new to Mountain Lion, I guess I have a lot to learn. As a long time user of Mac's, I thought I knew it all...

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External hard drive not recognized by OS

External FW HD not recognized by Disk Utility and "not available" to Time Machine. Had worked fine until last attempt to B.U. Core Duo, OS10.8.4. Suggestions to make this drive available again?

If the drive has more than one interface (USB, FireWire, Thunderbolt, eSATA), try one of the other interfaces.
Check that the data cable is securely inserted at both ends.
Try a different cable.
If you're connecting the drive through a hub, connect it directly to a built-in port on the Mac.
If you're connecting it directly, try a different port.
Disconnect all other devices on the bus, or as many as possible.
Test the drive with another Mac. Test another drive with this Mac.
If the drive is bus-powered, but has an AC adapter, connect the adapter.
Boot into Recovery and launch Disk Utility. Is the drive recognized?
Start up in Safe Mode and test.
Reset the NVRAM.
Reset the System Management Controller.
If the drive doesn't work under any of the above conditions, and if another drive does work with the same Mac, then the drive has failed. You may be able to salvage the mechanism by removing it from the enclosure and installing it in another one, or in a drive dock.

Some data DVD's and External Hard Drives not recognized by Leopard only.

1] Some data DVDs that were burned under Tiger do not show up in Leopard. Only a dialog box asking what I want to do with the blank DVD comes up when I insert the disk. On my Tiger computer, the disk shows up perfectly fine. It is a DVD+R being used on a MBP 2ghz... and was burned on that very machine in Tiger and would load fine in Tiger. Now nothing on the same computer in Leopard. I'm going to reburn the disk on my Mac Mini on a DVD-R, but still wanted to know any ideas or input as to why it won't recognize the disk.
2] I also have an external USB2.0 HD. I formatted the disk using my G4 Mac Mini (which has Tiger) and it is not recognized on my MBP. In Disk Utility I try to reformat the drive, but it says that it cannot do so because the "resource is busy". I plug the drive back into the mac mini and it works perfectly fine. Why would this be and how do I correct it?
Full updates on both OS's. No other problems with either computer that I know of.

Unfortunately, commercial DVDs that you have bought 99.9% of the time will be copy protected and Apple's forum terms prohibit discussion of circumventing the copy protection. In various places circumventing digital copy protection is potentially illegal even if you own and intend to keep the DVD. Hence Apple do not wish DVD rippers etc discussed here.
Another problem is that AppleTv cannot play back DVDs copied to an external drive as it does not understand the format. So even if you can 'copy' your DVDs you then need to convert to h264 format to play on AppleTV.
Video formats for AppleTv are limited. They also do not support DVD like menu structures (thogh AppleTV 1 did with itunes Extras movies).
If you have unprotected video you wish to convert eg home video on DVD, then something like Handbrake or MPEGStreamclip with Apple's MPEG2 component might do the job. These programs are not DVD rippers but can process unprotected MPEG2 video.
AC

External USB drive not recognized.

I have two LaCie external drive which work fine, but all my other external drive aren't recognized.
I know this was happening with 10.4.10, any way to fix this with Leopard?

Me too:
USB4500 FW1.04:
Version: 0.01
Bus Power (mA): 500
Speed: Up to 480 Mb/sec
Manufacturer: DATAST0R Technology Corp
Product ID: 0x4500
Serial Number: 1966051022645658
Vendor ID: 0xed06
System profiler sees it, Virtual PC sees it in the USB settings, but it does not work in Windows on VPC.
USB prober sees it:
High Speed device @ 5 (0x5B300000): ...... Composite device: "USB4500 FW1.04"
Device Descriptor
Descriptor Version Number: 0x0200
Device Class: 0 (Composite)
Device Subclass: 0
Device Protocol: 0
Device MaxPacketSize: 64
Device VendorID/ProductID: 0xED06/0x4500 (unknown vendor)
Device Version Number: 0x0001
Number of Configurations: 1
Manufacturer String: 16 "DATAST0R Technology Corp"
Product String: 32 "USB4500 FW1.04"
Serial Number String: 48 "1966051022645658"
Configuration Descriptor: ................................."1966051022645658"
Length (and contents): 32
Number of Interfaces: 1
Configuration Value: 1
Attributes: 0xC0 (self-powered)
MaxPower: 98 ma
Interface #0 - Mass Storage/SCSI
Device Qualifier Descriptor
Descriptor Version Number: 0x0200
Device Class 0 (Composite)
Device Subclass 0
Device Protocol 0
Device MaxPacketSize: 64
Number of Configurations: 1
bReserved: 0
Other Speed Configuration Descriptor: ....................."1966051022645658"
Length (and contents): 32
Number of Interfaces: 1
Configuration Value: 1
Attributes: 0xC0 (self-powered)
MaxPower: 98 ma
Interface #0 - Mass Storage/SCSI
... but USB Prober gets this same error over and over:
314.289 [1] AppleUSBEHCI[0x1f05800]::Found a transaction past the completion deadline on bus 0x5b, timing out! (Addr: 5, EP: 2)
314.289 [1] AppleUSBEHCI[0x1f05800]::Found a transaction past the completion deadline on bus 0x5b, timing out! (Addr: 5, EP: 2)
Worked like a charm on 10.4.10 before the upgrade ... ... and it still works great if I plug it to my Windows workstation ...

[solved] External Hard Drive Not Recognized

I bought a SATA-to-USB 2.0 external HDD enclosure today (found here), and plugged in a 320gb WD Scorpio Blue. When I first plugged it into my laptop, with Crunchbang Stalter on it, it worked perfectly. I partitioned it and everything. However, I then plugged it into my desktop with Arch on it, kernel version 3.4.4.2, and it was not recognized. lsusb returns nothing related to it, fdisk -l does nothing, and dmesg only displays "fuse init (API version 7.18)". I have tried multiple file systems, set up on my laptop, including ext4, fat32 and ntfs, with absolutely no luck. I would greatly appreciate any help.
Last edited by mjdudak (2012-07-11 15:56:32)

I was actually having the same problem with a USB to SATA adapter that only occured on my arch box. When the device was plugged in it showed the event in dmesg and then it got registered as /dev/sde. If I tried to use the mount command though it gave me some error like "could not read from inode" or something like that. After upgrading to kernel 3.4.4-4 the problem seems to have corrected its self now. Are you using systemd or udev?
Last edited by mynis01 (2012-07-10 09:01:38)

External hard drive not recognized... help please.

okay, well here is the story:
my iBook G4 had its stock 30gb hard drive in it and it was running extremely low on space. so i figured i didn't want to carry around an external hard drive, therefore i would buy an internal hard drive an install it. so i purchased a new 2.5" 80gb hard drive and called up the local apple store. they told me that although it was under warranty, that it did not cover hard drive installation. so i looked it up online and found step by step instructions to install the hard drive. so after lots of hard work and many screws, i installed the new hard drive successfully... but i still had this perfect 30gb hard drive. i thought maybe to save a few bucks i could turn it into a usb external hard drive. i found an enclosure for the hard drive and a usb 2.0 cable and plugged it into my ibook. it was recognized and everything. i put some files on the external hard drive and transferred it to another mac. this is where the trouble started. i plugged the hard drive into a PowerMac G4, and it was not recognized... so i tried it on a different mac. this time on a PowerBook G4, but no luck. this issue has been troubling me for a few weeks. but then i tried it on a similar iBook G4... and it was recognized. but i don't know why it was only recognized only on the iBook G4 (not the same iBook G4 it was pulled out of) and no other macs.
does anybody have any ideas what we can do to get this hard drive to be recognized by other macs?
any of even the smallest ideas would be greatly appreciated.
thanks,
tyler
iBook G4 Mac OS X (10.4.3)

I can walk you through formatting the hard drive:
1. Hook it up to an iBook that recognizes it.
2. Go into your Applications folder, then scroll down to Utilities. Open Utilities and scroll down a bit and you should see Disk Utility. Double-click.
3. On the left side you should see your internal hard drive and your external one. Each hard drive will have a sub-catagory with the partition indented.
4. Your external hard drive will probably be the second catagory. Click it.
5. In the center-top you should see the tabs First Aid, Erase, Partition, RAID, and Restore. Click the Erase tab.
6. You should see Volume Format: and then a drop down menu, and Name: and a text box. Type in the name you want the external hard drive to be named.
7. In the drop down menu, select Mac OS Extended (Journaled).
8. Then, simply click Erase, watch the progress and it should be good to go!!
Hope I helped you out. Oh, and it might be the enclosure...and also what OS's? Since it's USB it is probably using a USB Mass Storage driver. Mac-wise, if formatting doesn't help, I would get a FireWire enclosure because FireWire is much faster than just USB 2.0. Oh, thats nother thing...Is the enclosure Hi-Speed USB? If it isn't, I would definitely get a FireWire one...If it is, the PowerMac G4 doesn't have Hi-Speed so you're not taking full advantage..Just some insight
iBook G4 Mac OS X (10.4.3) 512 MB Ram, CD-RW Combo Drive, 40 Gig HD, bought in October of 2005...
Message was edited by: Hilary_Rose

External hard disc not recognized

I have been using a WD external hard disc with Time Machine. Today I had it plugged into a USB powered hub when the house electrical power briefly went off then on, twice. A message appeared stating that device was removed incorrectly (or words to that effect). Now the HD does not appear on the desktop. It is recognized in "about this computer" as a USB device. It is not recognized in disc utility and thus can not be mounted.
All suggestions appreciated.

Answered my own question. Working now. Connected directly to computer USB and ignored it for a couple of hours and now it is visible on the desktop and appears to be working.

External hard drive not recognized on new macbook

we have an external harddrive that we used as the time machine for our previous imac. we just bought a macbook pro, and the harddrive is not recognized and does not show up on the sidebar. it is however shows up on disk utility but i dont know what to do with it/how to get files from my old time machine. please help! thanks

The hard drive will not show up on the sidebar or desktop unless Finder preferences are set to do that:
In Finder's General preference section, make sure "External disks" is checked in the list of things to show on the desktop if you want to see them there.
Likewise, in Finder's Sidebar preference section, make sure "External disks" is checked in the "DEVICES" section to see them automatically appear on the sidebar.
But you don't need to do either for the MBP to recognize the drive, or to get files from its Time Machine backup set. To do that, you should use the Time Machine "Star Wars" interface. Pondini's FAQ's (already mentioned) tell you how to do that. Tip 17 is particularly relevant.

External Hard Drive Not Recognized In Vista?

I have a Western Digital MyBook hard drive, 500 GB. I have my Time Machine backups un there as well as my iTunes music.
However, whenever I am in Vista, it never shows up in the Explorer.
Why is this happening?

I am new to mac but also have fusion. I have the western digital ext hard drive and a back up genie to back up my fusion pc side and a seperate simpletech 1 tb ext hard drive configured for my mac. I also have a shared drive that i can save from side to side. With all this said i sometimes have the issue of not recognizing the western digital in my fusion pc side. Then all of sudden hours or a day later it will be there. It is not formatted for mac. Help, how do i get it recognized all the time.

Now, USB External Hard Drive Not Recognized after 10.6.8 Update

My external Hard Drive is not recognized on start up. I have to unplug it and plug it back in for it to be recognized.
All this since 10.6.8 updated today.
I'm a fool for updating the same day.
This has happened before and I always forget the bugs in the software when it first comes out.

Alright, I'm gonna go ahead and close this thread. I found out the solution to my issue. Turns out it was a problem with a system file I changed right before installing. The error only occurred on a restart... the required 10.6.1 reboot was the first reboot since the change, so thus it looked like the culprit.
If you want a more thorough explanation of my problem (highly HIGHLY doubt it's gonna help you guys out), check this thread --> http://forums.appleinsider.com/showpost.php?p=1480362&postcount=8
Sorry for the trouble!

External hard drive not recognized by Mavericks?

I have a Western Digital My Passbook 500GB external hard drive connected to my MacBook Pro via USB.
It worked fine until I upgraded to Mavericks. Now it is not recognized at all in my Finder.
When I go to Disk Utility, it finds it and says "not supported". When I do "disk verify" it says it needs to be repaired.
When I try to repair it, it says it can not.
What do I do?

See: http://wdc.com/wdproducts/wdsmartwareupdate/wdsmartware.asp?id=wdfGeneric&os=mac
WD SmartWare update highlights:
Mac release 1.3.6 (updated 11/25/2013)
Fixed an issue related to reports of some customers, under certain conditions, experiencing data loss when updating to Apple's OS X Mavericks (10.9).For more information on this issue, please click here.*Please note that if you have a previous version of WD Drive Manager installed on your computer, this software package will automatically uninstall the old version and install a new version.

External HArd Drive not recognized by MAcBook Air

Hi,
I bought an external hard drive(from LaCie) few months ago and plugged it once to my Macbook Air. I tried to plug it again last month and my MacBook Air didn't recognize it. I also tried to plug it in a PC and not recognized as well.
I've been told to check in the disk utility folder and to format (erase) my hard drive in order to have it running again, but even in the disk utility, hard drive is not recognized.
If anyone had the same problem before, i'd be gratefull of some help.
Many thanks

what lacie hard drive did you buy?
some hard drives require power supplies. if your hard drive requires one make sure it's firmly connect at both ends. If you haven't done so try another outlet. Also some lacie hard drives have a 3 mode switch on the back. make sure it's set to on, if your hard drive has a switch.
Some of the lacies hard drives have a blue button on the front. try another cable. see if the hard drive shows up as a USB device.

External LG monitor not recognized by MBP

I've been using an LG Flatron L22WTG external monitor with my MBP (purchased 2011) running 10.7.2. The monitor worked fine until recently and now is not recognized by the MBP and goes into "power saving mode". There is no response when I press "recognize monitors". Tried the settings for power saving and monitors. This issue is recent, but I don't know if it occured with my recent installation of the last Lion patch.

Me too, but my LG monitor just stopped working after I installed the recent "Thunderbolt Firmware Update".
Literally the monitor was working yesterday. This morning I installed the update and now it's broken. Great update.
Anyone have a fix?

External DVD drive not recognized with Leopard install

I just installed Leopard and my external firewire DVD drive (LG; GSA-5120D) is not recognized.
I used patchburn for Tiger to recognize it but there is not Leopard version. any ideas? thx

answered!
I used Patchburn with Tiger. After I removed the Patchburn generated drivers from Library/DiscRecording/DeviceProfiles and restarted, it now works fine.

External hard drive not recognized, or recognized as RAW

I have the Pavillon desktop running Windows 7 and have been having trouble with my computer either not recognizing Seagate 2 TB external drive, or if recognized, it is listed as Raw. I have:
1. Connected the drive to my laptop - it worked fine;
2. Changed the USB port on my desktop, over and over, same problem;
3. Reformatted the drive, same problem;
4. hooked it up to a different outlet, same problem;
5. Run the delivered HP hardware diagnostic tools, no errors noted, but same drive problem persists;
6. Updated drivers, over and over.
Is there ANYTHING else I can try?

Hi,
Please post the HP product number for your PC. How to Find the HP Model Number and the HP Product Number or let HP automatically find your PC model number and HP network attached printers. This will allow others to review your issue, make suggestions and review your responses. This is usually the best way to get assistance.
HP DV9700, t9300, Nvidia 8600, 4GB, Crucial C300 128GB SSD
HP Photosmart Premium C309G, HP Photosmart 6520
HP Touchpad, HP Chromebook 11
Custom i7-4770k,Z-87, 8GB, Vertex 3 SSD, Samsung EVO SSD, Corsair HX650,GTX 760
Custom i7-4790k,Z-97, 16GB, Vertex 3 SSD, Plextor M.2 SSD, Samsung EVO SSD, Corsair HX650, GTX 660TI
Windows 7/8 UEFI/Legacy mode, MBR/GPT

External CD reader not recognized, why?

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