iMac hangs then reboots

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Level 1

4 points

iMac hangs then reboots

I have a mid-2015 27" iMac Retina 5k, running the latest public update of El Captain (10.11.3 I believe).

I use the internal 1TB HDD for file storage and boot off of a Thunderbolt Lacie 250GB solidstate. I've been running it this way no problem since I got this iMac, and ran it the same way for years previously on an older 21.5" iMac too.

I was using my iMac with remote control software today and it was working fine, as usual. When I got home and physically tried to use my iMac, I noticed that it was powered off which is unusual as I have it set to stay on all the time (for remote access), and if it experiences a power outage to automatically reboot.

So I turned it on, the boot progress bar gets to about 2/3 then hangs and eventually reboots itself after a few minutes. This'll go on with no change.

So I tried resetting the NVRAM/PRAM - no change.

Tried resetting SMC - no change.

Booted into Recovery Mode no problem, ran Disk Utility's first aid on both drives with no problems - no change.

Tried the Apple Diagnostic test by holding "D". Found no issues. No change.

Tried holding Shift to boot into safe mode. Loading bar got to 2/3 then screen goes black, a mouse cursor appeared, then nothing else happened.

Tried Single User mode then ran "fsck -fy" which returned "file system has been modified" so I ran it again which returned "appears to be ok", so I rebooted which got me to 2/3 and then a black screen with no other progress or mouse.

Tried verbose mode, but it only appears on the screen for about 2 seconds, runs through a bunch of lines, then disappears to a black screen and goes nowhere.

Any other steps I can try before I reinstall OSX, as obviously I'd rather not have to do that?

iMac with Retina 5K display, OS X El Capitan (10.11.3)

Posted on Feb 4, 2016 9:11 PM

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Answer 1

rkaufmann87

Level 10

140,532 points

Feb 4, 2016 9:27 PM in response to ncrashb

Please post an EtreCheck report of your system and we can look for obvious issues.

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Answer 2

ncrashb Author

Level 1

4 points

Feb 4, 2016 9:32 PM in response to rkaufmann87

I'm not sure if you read my whole post or not, but I cannot boot into OSX, therefore I cannot run EtreCheck. Unless it can be run off of a USB drive in Recovery mode or something but I don't know.

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Answer 3

rkaufmann87

Level 10

140,532 points

Feb 5, 2016 5:33 AM in response to ncrashb

Are you running a beta version of OS X on the computer? You mentioned "latest public update of El Captain (10.11.3' hence my question.

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Answer 4

ncrashb Author

Level 1

4 points

Feb 5, 2016 6:49 AM in response to rkaufmann87

Not beta. Latest general public update, 10.11.3.

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Answer 5

rkaufmann87

Level 10

140,532 points

Feb 5, 2016 6:57 AM in response to ncrashb

Will it boot to the Recovery Partition ( Command + R) ? If not then take it in for service.

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Answer 6

ncrashb Author

Level 1

4 points

Feb 5, 2016 6:58 AM in response to rkaufmann87

Yes it will (as mentioned in my original post), however I can't fix it from Recovery mode- disk utility first aid says everything's fine.

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Answer 7

rkaufmann87

Level 10

140,532 points

Feb 5, 2016 7:34 AM in response to ncrashb

IF it has a Fusion drive then my guess is the link is broken. You have no choice but to take it in for service.

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Answer 8

ncrashb Author

Level 1

4 points

Feb 5, 2016 7:52 AM in response to rkaufmann87

Its not a fusion drive, as I stated in the original post, it has a 1TB regular HDD internal drive, and external Thunderbolt SSD.

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Answer 9

ncrashb Author

Level 1

4 points

Feb 5, 2016 3:45 PM in response to ncrashb

After a few more attempts at booting my iMac, which failed, then trying to boot into Safe Mode, it eventually loaded my login screen in Safe Mode.

So I was able to run EtreCheck:

EtreCheck version: 2.9.3 (253)

Report generated 2016-02-05 17:43:34

Download EtreCheck from http://etrecheck.com

Runtime 1:22

Performance: Excellent

Click the [Support] links for help with non-Apple products.

Click the [Details] links for more information about that line.

Problem: Computer is restarting

Description:

Computer fails to boot.

Hardware Information: ⓘ

iMac (Retina 5K, 27-inch, Mid 2015)

[Technical Specifications] - [User Guide] - [Warranty & Service]

iMac - model: iMac15,1

1 3.3 GHz Intel Core i5 CPU: 4-core

8 GB RAM Upgradeable - [Instructions]

BANK 0/DIMM0

4 GB DDR3 1600 MHz ok

BANK 1/DIMM0

4 GB DDR3 1600 MHz ok

BANK 0/DIMM1

Empty

BANK 1/DIMM1

Empty

Bluetooth: Good - Handoff/Airdrop2 supported

Wireless: Unknown

Video Information: ⓘ

AMD Radeon R9 M290 - VRAM: 2048 MB

iMac 5120 x 2880

System Software: ⓘ

OS X El Capitan 10.11.3 (15D21) - Time since boot: less than an hour

Disk Information: ⓘ

APPLE HDD ST1000DM003 disk0 : (1 TB) (Rotational)

EFI (disk0s1) <not mounted> : 210 MB

Internal (disk0s2) /Volumes/Internal : 999.86 GB (715.79 GB free)

SanDisk SSD U100 256GB disk1 : (256.06 GB) (Solid State - TRIM: No)

EFI (disk1s1) <not mounted> : 210 MB

Lacie (disk1s2) / : 255.20 GB (209.61 GB free)

Recovery HD (disk1s3) <not mounted> [Recovery]: 650 MB

USB Information: ⓘ

Apple Inc. BRCM20702 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Inc. FaceTime HD Camera (Built-in)

Razer Razer Abyssus

Thunderbolt Information: ⓘ

Apple Inc. thunderbolt_bus

LaCie Rugged mini

Gatekeeper: ⓘ

Anywhere

Kernel Extensions: ⓘ

/Library/Extensions

[not loaded] com.citrix.kext.gusb (1.0) [Support]

System Launch Agents: ⓘ

[loaded] 160 Apple tasks

[running] 76 Apple tasks

System Launch Daemons: ⓘ

[failed] com.apple.watchdogd.plist [Details]

[loaded] 192 Apple tasks

[running] 94 Apple tasks

Launch Agents: ⓘ

[loaded] com.adobe.AAM.Updater-1.0.plist [Support]

[loaded] com.adobe.AdobeCreativeCloud.plist [Support]

[loaded] com.citrix.AuthManager_Mac.plist [Support]

[loaded] com.citrix.ReceiverHelper.plist [Support]

[loaded] com.citrix.ServiceRecords.plist [Support]

[loaded] com.google.keystone.agent.plist [Support]

[loaded] com.teamviewer.teamviewer.plist [Support]

[loaded] com.teamviewer.teamviewer_desktop.plist [Support]

[loaded] org.chromium.chromoting.plist [Support]

Launch Daemons: ⓘ

[loaded] com.adobe.agsservice.plist [Support]

[loaded] com.backblaze.bzserv.plist [Support]

[loaded] com.google.keystone.daemon.plist [Support]

[loaded] com.teamviewer.Helper.plist [Support]

[loaded] com.teamviewer.teamviewer_service.plist [Support]

User Launch Agents: ⓘ

[loaded] com.adobe.AAM.Updater-1.0.plist [Support]

[loaded] com.backblaze.bzbmenu.plist [Support]

[loaded] com.valvesoftware.steamclean.plist [Support]

User Login Items: ⓘ

Steam Application (/Applications/Steam.app)

iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

Dropbox Application (/Applications/Dropbox.app)

Caffeine Application (/Applications/Caffeine.app)

Other Apps: ⓘ

[running] com.apple.xpc.launchd.oneshot.0x10000005.EtreCheck

[running] com.google.Chrome.59552

Internet Plug-ins: ⓘ

CitrixICAClientPlugIn: Version: 12.1.0 - SDK 10.10 [Support]

QuickTime Plugin: Version: 7.7.3

AdobeAAMDetect: Version: 3.0.0.0 - SDK 10.9 [Support]

Default Browser: Version: 601 - SDK 10.11

3rd Party Preference Panes: ⓘ

Backblaze Backup [Support]

remoting_host_prefpane [Support]

Time Machine: ⓘ

Skip System Files: NO

Auto backup: YES

Volumes being backed up:

Lacie: Disk size: 255.20 GB Disk used: 45.60 GB

Destinations:

Noah 2TB [Local]

Total size: 2.00 TB

Total number of backups: 43

Oldest backup: 2013-03-23, 10:27 PM

Last backup: 2015-11-28, 5:07 PM

Size of backup disk: Excellent

Backup size 2.00 TB > (Disk size 255.20 GB X 3)

Top Processes by CPU: ⓘ

4% fontd

1% WindowServer

1% kernel_task

1% Dock

0% SystemUIServer

Top Processes by Memory: ⓘ

958 MB Google Chrome Helper(5)

578 MB kernel_task

467 MB softwareupdated

295 MB WindowServer

221 MB Google Chrome

Virtual Memory Information: ⓘ

1.88 GB Free RAM

6.12 GB Used RAM (3.70 GB Cached)

0 B Swap Used

Diagnostics Information: ⓘ

Feb 5, 2016, 05:29:07 PM Self test - passed

Feb 4, 2016, 12:38:43 PM /Library/Logs/DiagnosticReports/Adobe Lightroom_2016-02-04-123843_[redacted].cpu_resource.diag [Details]

/Applications/Adobe Lightroom/Adobe Lightroom.app/Contents/MacOS/Adobe Lightroom

Feb 3, 2016, 08:39:34 AM /Library/Logs/DiagnosticReports/TeamViewer_Desktop_2016-02-03-083934_[redacted] .crash

/Applications/TeamViewer.app/Contents/Helpers/TeamViewer_Desktop

Feb 2, 2016, 10:41:25 PM /Library/Logs/DiagnosticReports/Adobe Lightroom_2016-02-02-224125_[redacted].cpu_resource.diag [Details]

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