Welcome to the MacNN Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Desktops > New iMac problem

New iMac problem
Thread Tools
Harvey
Forum Regular
Join Date: Sep 2000
Location: Dracut, MA, USA
Status: Offline
Reply With Quote
Apr 24, 2015, 08:19 AM
 
My iMac is 8 months old and has stated to act up. First I was unable to get preview to open and more recently it is happening to Safari. My messages say "already open" yet it will not open even with a quit and restart. Rebooting seems to be the only fix. I also am running 5 external drives through a usb hub and that seems to contribute to my problems but I do not know how . . . only that running my iMac without any external drives seems to be a fix also. At one point last week it got so bad that the only thing I could do was a re-install the OS using time machine and the app store. Has anyone else experienced this type of behavior lately with Yosemite or may I have a hardware concern. One more thing: during these episodes the iMac has turned totally black or blue at various times and has needed a back-panel start button reboot. This is my 3rd iMac and is a bit disheartening. I am a mac user since 1985.

Harvey
     
Mike Wuerthele
Managing Editor
Join Date: Jul 2012
Status: Offline
Reply With Quote
Apr 24, 2015, 10:04 AM
 
This sounds like an I/O problem, and I have a culprit in mind, but lets get some basic troubleshooting out of the way.

Well, for clear troubleshooting, I'd try the drives one at a time connected to the iMac, to see if the problem manifests itself individually. If the answer to this question is no, then the problem is likely related to the hub.

Then, I'd plug the hub it, and try single drives again to see if the problem manifests.

I've got nine drives, connected through three different drive cases to a Mac mini, and I've got no issues like you've seen. I do suspect you have a hardware problem, but not with the iMac.
( Last edited by Mike Wuerthele; Apr 24, 2015 at 01:18 PM. )
     
Harvey  (op)
Forum Regular
Join Date: Sep 2000
Location: Dracut, MA, USA
Status: Offline
Reply With Quote
Apr 24, 2015, 11:47 AM
 
Thanks, Mike. How long before I deem the external drive as OK? a day. a week?
     
Mike Wuerthele
Managing Editor
Join Date: Jul 2012
Status: Offline
Reply With Quote
Apr 24, 2015, 01:18 PM
 
A day of use, probably.
     
BradMacPro
Fresh-Faced Recruit
Join Date: Aug 2002
Location: Islandia, NY
Status: Offline
Reply With Quote
Apr 24, 2015, 05:01 PM
 
Are any of the external USB hard drives formated with Apple Partition Table from a PowerPC earlier Mac or Master Boot Record from a PC or many drives come from the factory this way? This trips up some software.
     
BradMacPro
Fresh-Faced Recruit
Join Date: Aug 2002
Location: Islandia, NY
Status: Offline
Reply With Quote
Apr 24, 2015, 05:05 PM
 
You might need this recent update:
https://support.apple.com/kb/DL1808?locale=en_US
     
Harvey  (op)
Forum Regular
Join Date: Sep 2000
Location: Dracut, MA, USA
Status: Offline
Reply With Quote
Apr 25, 2015, 03:07 PM
 
Two of the drives came out of older macs, one a 2008 iMac and another from a 2012 MacBook Pro. Neither were erased or newly partitioned. Could these be causing some sort of identity problems as to start-up disks. I did rename them. The other two external drives were store bought. Thank you for your input.
Harvey
     
   
Thread Tools
 
Forum Links
Forum Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Top
Privacy Policy
All times are GMT -4. The time now is 09:30 AM.
All contents of these forums © 1995-2017 MacNN. All rights reserved.
Branding + Design: www.gesamtbild.com
vBulletin v.3.8.8 © 2000-2017, Jelsoft Enterprises Ltd.,