Since updating to Lion the iMac won't recognise the external hard drive (maxtor) when waking from sleep mode,

Hi All, Since updating to Lion, my imac won't recognise the ext HDD (Maxtor) when waking from sleep mode, I have tried another port, diisc utility (Ext HDD not listed in here) but nothing works. I now find that I have to restart the imac to get the drive recognised..which is fine until the imac goes into sleep mode then I lose the drive and have to restart etc etc.....anyone suffering same issue. The Ext Drive worked perfectly until the upgrade..

Thanks for this, and apologies for delay in replying...in between seeing your post I backed up the ext hdd to another mac and used the disc utility to erase and repair and then re mounted the ext hdd. OK. I have then tested the ext hdd being recognised when waking from sleep mode a few times and everything appears to be fine. If this doesn't work (long term) I will follow the instructions as you have suggested....
I now have a new problem with my HP printer (Photosmart Plus) which is not being recognised by a new wireless router..Ok whilst the router is switch on and I have reconfigured the printer..but when the router is switched off overnight and then switched back on...I get a 'printer is not connected' message and have to go through the re configure routine all over. I am minded to think this is a router problem as the same issue is happening to my wifes Mac Book Pro (which is only a few weeks old)...any suggestions..

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Why my new iMac won't read my external hard drive?

Why my new imac won't read my external hard drive??

Liz,
Sorry for not responding sooner, I support your position completely - as for the external drive I assumed that the individual was a previous mac user and knew about that (my mistake) at home I have a couple of external drives
one drive is acknowledged regardless of format (mac/win) its a partitioned drive.... the other one - far as the mac is concerned does exist when i connect it. I believe its a win only drive (will have to check the specs on it) but it works on the win-notebooks.
so my point of reference was coming that perspective, with no additional posts I have to assume you had the correct answer. have a great day.

My MacBook Pro won't reconnect to my Wi-FI automatically after waking from sleep mode

Hello, everyone. Since I updated to Yosemite, my MacBook Pro won't reconnect to my Wi-FI automatically after waking from sleep mode.
Does anyone know how to fix that?
Thanks in advance,
Arthur.

Hi, arthurpacifico.
Thank you for visiting Apple Support Communities.
Here are a couple troubleshooting steps that I would recommend trying to see if it corrects this issue.
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964
Reset your computer’s PRAM
http://support.apple.com/kb/HT1379
If the issue persists, try the troubleshooting steps I have attached below.
Symptom: After restarting or waking from sleep, my computer might not connect to the Internet
After waking from sleep or starting up, your computer may not show that it is connected to a Wi-Fi network.
After start or wake, your computer may indicate that it is connected to a network, but does not connect to the Internet.
Solution
Use these steps if your computer does not automatically connect to your desired Wi-Fi network.
Check your TCP/IP settings in the Network pane of the System Preferences. Click the "Renew DHCP lease" button
Choose System Preferences from the Apple menu.
Choose Network from the View menu.
Select Wi-Fi, then click the Advanced button in the lower-left hand corner of the screen.
Click the TCP/IP tab from the top of the screen.
Click the "Renew DHCP lease" button.
Select the Wi-Fi tab and view your Preferred Networks list.
Select each network and click the minus sign to remove those networks from your Preferred Networks list.
Click OK and close the Network preferences.
Remove your stored network passwords using the Keychain Access Utility.Restart your computer.
Open Keychain Access from /Applications/Utilities. Your window will look like this:
Remove your AirPort network passwords from the login keychain: Select the "login" keychain from the Keychain sidebar. Click the "Kind" column to order the list of keychain items by their type. Remove all entries of the kind: "AirPort network password".
Remove your AirPort network passwords from the System keychain: Select the "System" keychain from the Keychain sidebar. Click the "Kind" column to order the list of keychain items by their type. Remove all entries of the kind: "AirPort network password".
Note: The above steps will remove your Wi-Fi network passwords. If you do not know them, or if your network does not use passwords to restrict access, you should contact your network administrator.
Join your Wi-Fi network. You will need to enter your password for your network again if it requires one.
Wi-Fi: How to troubleshoot Wi-Fi connectivity
http://support.apple.com/kb/ht4628
Cheers,
Jason H.

Wifi disconnects when waking from sleep mode; running Mountain Lion

Had this same issue with Lion as well,, wifi disconnects when waking from sleep mode,,,any ideas how to fix this pesky issue?

Hi Sky,
This has worked for a few...
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
10.7…
System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
10.5.x/10.6.x/10.7.x instructions...
System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
The interface that connects to the Internet should be dragged to the top of the list.
Instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.
For 10.5/10.6, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
208.67.222.222
208.67.220.220
Click OK.
Also, turn off IPv6:
System Preferences » Network » AirPort » TCP/IP tab » Configure IPv6
Or whatever Interface you use.

Why does my computer tell me the "Disk was not properly ejected" when waking from sleep mode?

I am a real "Newbie" to Mac OS. I have a new iMac 21.5" running OS X Lion. When I awake the computer from sleep mode with the spacebar on the keyboard, I get the message "The disk was not ejected proper, etc.". Iss there something I am doing wrong?
Thanks,
Mike G.

I am one of those who had experienced this kind of problem. My former Time Machine disk used to automatically eject itself when my iMac sleeps, hence upon waking up my iMac. i always get the error message that the disk was not properly ejected.
From what I was able to gather from my experience, until the time that I found a workable solution, I think I can say that the problem is most probably caused by the incompatibility of certain external drives with how the iMac operates when on sleep and upon waking up. Some external drives are just not able to cope with how the iMac tries to remount a connected disk after it wakes up from sleep. There are just some external drives that cannot continue to be mounted after the iMac wakes from sleep. There are just some external drives that are not responsive enough. In other words, the existence of the problem lies with the type of external drive you are using.
My former Time Machine disk, the problematic one, was an Imation M300 Apollo 1 TB external disk. It unmounts everytime my iMac went to sleep, but does not remount after waking up the iMac. The disk will continue to be unmounted until I physically remove its USB connector and replug it in the iMac.
I replaced my former Time Machine disk with my current one, a Transcend Storejet 1 TB. And the problem went away. The Transcend disk continue to be mounted after the iMac is woken up even from the longest of sleep. I have even the energy saving option "put the hard disk to sleep..." checked. The Transcend disk comes with a Y cable, i.e. it has two USB connectors, but I only connect the one for both data and power--and it still remains mounted even after waking the iMac from sleep.
The sad realization, however, is that since there are only some external drives that are not able to work with the iMac, no matter how many those some may seem to be, it will be highly unlikely for Apple to itself fix this kind of a problem.
I, therefore, make the following recommendations:
1. Check first if your problematic disk has a firmware upgrade available. In some cases, the firmware upgrade may be enough to make the disk more responsive to the iMac waking up.
2. If there is no firmware upgrade available, check if your power/data USB cable is properly working.
3. If your power/data USB cable is in order, and the problem still persists, I think it is inevitable that you have to replace the problematic disk with a newer one that could respond well with the iMac's wake/sleep operation. With what disk will you replace your problematic one? I can only recommend from my personal experience the Transcend disk I mentioned earlier. You may also search this forum on other brands of disks that may also work.
Regards.

My iMac has stopped recognising my external hard drive.

How do I get my iMac to recognise this external hard drive again?

Yes, while WD makes great drives in my experience, their enclosures & chipsets really don't do anybody justice.
Might try something like this...
http://eshop.macsales.com/item/Newer%20Technology/U3NVSPATA/

Since upgrading to Lion I can no longer mount my external hard drive

I backed up about 10 minutes before installing Lion when I was on Snow Leopard. I know my drive works fine and there are no issues with it.
However, when Lion was installed, I wanted to perform a Time Machine Backup, but it said my backup disk was unavailable. I checked in the Finder and it wasn't showing up in the side bar, even though it was connected to my Mac and the indicator light on the hard drive itself was flashing - suggesting drive activity. I can also hear the drive spinning.
I opened Disk Utility and the external hard drive appears in the side bar and it says 'WD My Passport 071A Media'. Underneath that is the 'Time Machine Backups' drive which is greyed out. I have tried right clicking on it and choosing Mount but it won't mount, and I have also tried Repair Disk which doesn't finish, but also doesn't report any errors either. If I run Verify Disk and Repair Disk on the 'WD My Passport 071A Media' drive (which is the same drive) it does not report any problems and says the drive is working fine.
I have tried updating the drive's firmware and using different ports but neither have worked. I have also tried rebooting my Mac.
I really need to use this drive to backup and I can't format it because I can't afford to lose any data on there. Could someone please give me some advice or tell me how to fix this? I would appreciate it so much.
Thanks,
Nathan

Nathan Miah wrote:
Is there absolutely anything else I could do to sort this such as phone Apple Support
If you want.
or maybe install Snow Leopard using the disc it came on with my Mac and just set it up from a Time Machine Backup on my external hard drive (since it works under SL)?
Did you install Lion on an empty partition, or did you upgrade Snow Leopard? If you upgraded, I'd not recommend erasing it, since your backups are apparently gone. It's doubtful Snow Leopard will recognize them.
It's not just backups on the drive either, there are other important things on there, so why won't they show?
Mixing Time Machine backups and other data is not a good idea. See #3 in Time Machine - Frequently Asked Questions. It sounds like the whole disk is corrupted.
I just really don't understand how this happened. Could it not be an issue with WD because they haven't issued firmware to support Lion yet?
If this is a simple external HD, connected by USB or FireWire, no, unless you installed some of WD's software on it. That shouldn't prevent it from being seen at all, but anything's possible.

My iMac won't recognize my external hard drive connected by FireWire 400

I have an external hard drive connected to my Intel-based iMac through a FireWire 400 cable. The drive doesn't come up on the desktop after turning on the hard drive power.
If I connect through the USB cable, it appears quickly on the desktop. Why isn't this working through FireWire? I had some trouble with this in Tiger as well, but was somehow able to get it to work.

The drive does not appear in Disk Utility.
And I don't think I'll be installing DiskWarrior until Leopards countless bugs are fixed, especially after reading THIS:
Alsoft: There are some DiskWarrior "compatibility issues" with Leopard
After previously stating "you can run the (current version of DiskWarrior under Leopard) knowing no harm will come to the hard drive or to your data," Alsoft has now posted a message to its Web site stating "there are some compatibility issues when running an installed copy of DiskWarrior 4.0 while started up from Mac OS X 10.5 Leopard. Alsoft currently recommends that you do not run DiskWarrior 4.0 while the computer is started from Mac OS X 10.5 Leopard."
http://www.macfixit.com/article.php?story=20071026153956503

IMac won't boot if external hard drive running Time Machine powered on

Upon rebooting, my iMac 3.06 GHz Intel Core 2 Duo with 4GB RAM, running OS X 10.5.4, locked up in a gray screen, the "gray screen of death."
At the recommendation of the Apple Tech Support rep, I turned off the iMac using the power button, and rebooted with my USB and Firewire devices removed.
The iMac boots fine with everything except my G-tech drive 1GB external hard drive running Time Machine with no partitions, attached using a Firewire 800 cable.
If the external hard drive is on, I get the interminable gray screen.
If I boot with the external hard drive powered off and then power it on after I'm at the Mac desktop, the disc image mounts normally on the desktop.
I've already repaired all disc permissions and it doesn't help.
My external hard drive has used 907 of the 931 GB true capacity. Supposedly, Time Machine removes the old files to make room for the new files.
Time Machine itself is running properly once I get my iMac booted in this peculiar way.

Raja,
Do a SMC reset perhaps even a couple of times and see if that helps. Also in System Preferences + Startup Disk make sure the internal HD is selected.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
Roger

I don't see a slot on the iMac to plug in my external hard drive. It only has usb ports and the one for plugging in the cable modem. Where/how do I plug it in?

new iMac, old external hard drive - where do I plug it in?

With this adaptor:
http://store.apple.com/us/product/MD464ZM/A/apple-thunderbolt-to-firewire-adapte r?fnode=51
it appears new iMacs can support FireWire.

My Macbook suddenly won't recognise my external hard drive

Hi there.
I am using an Intenso 2,5" MemoryStation as an external hard drive. I have a few folders with pictures on it and my TimeMachine. When I plug it in it would usually show up on my desktop and start backing up my hard disk automatically. Something has now changed.
My dad gave my Macbook a new hard disk with more storage. When he put it in, he first safety copied all my stuff onto a separate external hard drive - ie. not my own. My Macbook is working perfectly and looks and acts exactly like before. But when I plug in my external hard drive, it now doesn't show up, neither on my desktop nor in disk utility. I can see that the external hard drive is responding as a light switches on and off when I plug it in and out; I don't think it is broken as I have taken very good care of it.
I'm worried that I have formatted my external hard drive so that it will only respond to a (now old) backup of my Macbook, which I can't access from my new hard disk.
I do also have the external hard drive that my dad originally used to backup all my stuff - with the older backup. Is there a way I can have my external hard drive read the new external hard drive (with the old backup of my Macbook)? Or has anyone experienced anything like this before?
Sorry if it got a bit complicated. It is evident that I am no tech expert.
Best,
Anne Sofie

Open the Finder.
From the Finder menu bar click Finder > Preferences then select the General tab.
Make sure: External disks is selected.

Macbook pro won't recognise WD External hard drive

Have just purchased a macbook pro and it won't recognise my Western Digital external hard drive!!
It appears as 'Time Machine Backups' and doesn't show all my photos and music files. (deleting and reformatting WD hard drive not an option)
Can anyone help??
Many thanks

Sorry, meant deleting hard drive contents not an option, if required to do so to reformat.
Thanks

Apps do not respond when waking from sleep mode in Mountain Lion

updated to the new OS a few weeks ago (no more than 14days) - since the upgrade, everytime the Mac awakens from the sleep mode, nothing responds.
If you select the app the app will just bop up and down.
If you try to clear trash, the message window appears but doesn't complete the task.
If in Safari, the page doesn't load.
In iPhoto the a blank window opens but nothing else apears and the loading icon continues to rotate but nothing else happens.
The mac is using an ether net cable and not over wifi.
There is no problem if once I restart the machine, however this has to be done via the power scoket as the "restart and shutdown" options again do not respond and timeout.
To save energy I use the sleep mode all week Sunday PM to Friday AM. The machine is usally switched off all Day Saturday. However as I use it everyday during the week I avoid turning it on and off everyday. It is only 2 years old and I did not have this problem before the upgrade.
Anyone got any ideas or having simliar issues?

Hello:
From what you describe, I would probably reinstall OS X 10.8. In answer to your question, I have not seen anything similar.
You might also look at your log files around the wake time to see if anything looks "odd."
Barry

MBP won't boot without power adapter also problem when waking from sleep

Hi guys,
I have a MBP 2.8 GHz Intel Core 2 Duo with 4GB 1067 HHz DDR3
I have had this issue for a while now and done a lot of research to solve the problem, but not got anywhere...
I can't boot the mac without the magsafe attached. Also, I'm not sure it is a related issue, but if I close the lid on the computer, it goes to sleep fine, but when I lift the lid to begin working again, the screen is like an opaque white and I get a blocked loading bar at the bottom that takes an age to clear and then when the screen wakes up it take a while to become life again. I also had an issue with the motion sensor. When I moved it, It would send itself to sleep. The battery icon also displays an X in it and has done for a while.
To try and solve this I have:
• Reset the PRAM
• Reset the SMC
• Booted from disc and repaired permissions and made sure the disc was OK
• Bought an new official Apple battery
• And pretty much everything else I can think of and have read about.
A while a go (Whilst in warranty) I had a problem with the USB board thingy (The board that runs keyboard, tracker pad and USB etc). Not sure if that helps.
I am starting to think it is hardware (RAM maybe??).
Can anyone help??
Thanks in advance.

As an update...
I have now tried:
Erasing the HD and installing SL from scratch and then used Time Machine to put back my files and apps.
Guess what... No joy.
Can anyone actually help with this? I take it I am on my own in this 'Support' forum?
If anyone has any further suggestions that I might be able to try that would be wonderful. My head is getting quite sore now from banging it against the brick wall.
Thanks in advance

IMac won't recognize my external hard drive, and cannot backup onto it.

Time machine fault with Western Digital "my book" external drive
In trying to select a backup disc I follow these steps:
I have the drop down panel from Time machine preferences which asks me to select "time machine" by clicking on the "use for backup" button.
When I do this message appears,
"You do not have appropriate access privileges to save file “.0016cb83cfe5” in folder “Time Machine Backups”.
How do I set up "My book" to start backing up again? It was originally installed and backed everything up without a problem, but although the icon still appears on my desktop time machine will not backup.
Hope there is a simple explanation folks!

Welcome to Discussions compuvic!
I believe you're experiencing a problem that happened with the 10.5.6 update. There is a workaround found by V.K in [this thread|http://discussions.apple.com/message.jspa?messageID=8668572#8668572]. If you follow the instrux it should work.
/p

Since updating to Lion the iMac won't recognise the external hard drive (maxtor) when waking from sleep mode,

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