iMac startup freeze after update to OsX El Capitan

Lex,

1: Tap Tun vpn: Uninstall. Find another vpn if you really want vpn

Could not find so such thing as "Tap Tun vpn". FYI, my only vpn use is enabled through Citrix, which is a well reputed and fast updating source. It is a multi-platform VPN system, highly secured (it is used by e.g. Banks) and is absolutely mandatory for my work. Any hint?

2. AntiVirus Software: uninstall what you have, and if not, remove the remnants: in Finder MacintoshHD->Library->LaunchDaemons: delete the rapiback.plist. Then open the Trash, and select the plist, and while holding the CTL key, click it and choose "delete immediately" (thanks Leonie).

I had at a time installed Symantec's Norton Security Com Backup but quickly uninstalled it because it would significantly slow down the computer and was not too user-friendly with Citrix. I never installed any other anti-virus, and have none installed now therefore. But I did as you suggested.

Regarding Java, it was actually already set to ask. I'll be watching as you suggest.

I now have work to do, shall proceed as soon as with a bit of time available to take the risk (although I have the MacBook Air as a second resource, and all files are Synced by Mozy). Shall welcome any further suggestions if you'll think of any in the meantime.

Thanks, Pedro

Ok, now I found the tap and tun folders and have deleted them.

Lex,

I now did what I could / thought I should do and the new EtreCheck outcome is as follows:

EtreCheck version: 2.5.5 (215)

Report generated 2015/10/16, 17:28

Runtime 2:53

Download EtreCheck from http://etresoft.com/etrecheck

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

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

Hardware Information: (What does this mean?)

iMac (27-inch, Late 2013)

[Click for Technical Specifications]

[Click for User Guide]

iMac - model: iMac14,2

1 3,2 GHz Intel Core i5 CPU: 4-core

8 GB RAM Upgradeable

[Click for upgrade 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: en1: 802.11 a/b/g/n/ac

Video Information: (What does this mean?)

NVIDIA GeForce GT 755M - VRAM: 1024 MB

iMac 2560 x 1440

System Software: (What does this mean?)

OS X El Capitan 10.11 (15A284) - Time since boot: less than an hour

Disk Information: (What does this mean?)

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

EFI (disk0s1) <not mounted> : 210 MB

Macintosh HD (disk0s2) / : 999.35 GB (759.97 GB free)

Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB

USB Information: (What does this mean?)

Iomega eGo USB 999,46 GB

EFI (disk1s1) <not mounted> : 315 MB

PAlmeida_1TB01 (disk1s2) /Volumes/PAlmeida_1TB01 : 999.01 GB (611.91 GB free)

VIA Labs, Inc. USB3.0 Hub

Apple Inc. BRCM20702 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Inc. FaceTime HD Camera (Built-in)

Apple, Inc. Keyboard Hub

Apple Inc. Apple Keyboard

VIA Labs, Inc. USB2.0 Hub

Thunderbolt Information: (What does this mean?)

Apple Inc. thunderbolt_bus

Gatekeeper: (What does this mean?)

Mac App Store and identified developers

Kernel Extensions: (What does this mean?)

/Library/Extensions

[not loaded] foo.tap (1.0) [Click for support]

[not loaded] foo.tun (1.0) [Click for support]

/System/Library/Extensions

[not loaded] com.devguru.driver.SamsungComposite (1.4.27 - SDK 10.6) [Click for support]

[loaded] com.eltima.SyncMate.kext (0.2.5b15) [Click for support]

/System/Library/Extensions/ssuddrv.kext/Contents/PlugIns

[not loaded] com.devguru.driver.SamsungACMControl (1.4.27 - SDK 10.6) [Click for support]

[not loaded] com.devguru.driver.SamsungACMData (1.4.27 - SDK 10.6) [Click for support]

[not loaded] com.devguru.driver.SamsungMTP (1.4.27 - SDK 10.5) [Click for support]

[not loaded] com.devguru.driver.SamsungSerial (1.4.27 - SDK 10.6) [Click for support]

Launch Agents: (What does this mean?)

[loaded] com.citrix.AuthManager_Mac.plist [Click for support]

[running] com.citrix.ReceiverHelper.plist [Click for support]

[running] com.citrix.ServiceRecords.plist [Click for support]

[loaded] com.google.keystone.agent.plist [Click for support]

[running] com.mozy.status.plist [Click for support]

[loaded] com.oracle.java.Java-Updater.plist [Click for support]

[running] syncmateStarter.plist [Click for support]

Launch Daemons: (What does this mean?)

[loaded] com.adobe.fpsaud.plist [Click for support]

[loaded] com.google.keystone.daemon.plist [Click for support]

[loaded] com.microsoft.office.licensing.helper.plist [Click for support]

[running] com.mozy.backup.plist [Click for support]

[loaded] com.oracle.java.Helper-Tool.plist [Click for support]

[running] pcloudd.plist [Click for support]

User Launch Agents: (What does this mean?)

[loaded] com.adobe.ARM.[...].plist [Click for support]

[failed] com.google.GoogleContactSyncAgent.plist [Click for support] [Click for details]

[running] com.mozy.mozysync.plist [Click for support]

User Login Items: (What does this mean?)

None

Other Apps: (What does this mean?)

[running] com.apple.xpc.launchd.oneshot.0x10000003.Google Chrome

[running] com.etresoft.EtreCheck.92832

[running] com.microsoft.OneDrive-mac.62432

[loaded] com.microsoft.OneDriveLauncher

Internet Plug-ins: (What does this mean?)

FlashPlayer-10.6: Version: 19.0.0.226 - SDK 10.6 [Click for support]

QuickTime Plugin: Version: 7.7.3

Flash Player: Version: 19.0.0.226 - SDK 10.6 [Click for support]

Default Browser: Version: 601 - SDK 10.11

SharePointBrowserPlugin: Version: 14.5.6 - SDK 10.6 [Click for support]

CitrixICAClientPlugIn: Version: 12.0.0 - SDK 10.9 [Click for support]

Silverlight: Version: 5.1.40728.0 - SDK 10.6 [Click for support]

JavaAppletPlugin: Version: Java 8 Update 60 build 27 Check version

User internet Plug-ins: (What does this mean?)

Google Earth Web Plug-in: Version: 7.1 [Click for support]

Safari Extensions: (What does this mean?)

Keeper® Password Manager & Digital Vault

3rd Party Preference Panes: (What does this mean?)

Flash Player [Click for support]

FUSE for OS X (OSXFUSE) [Click for support]

Java [Click for support]

MozyHome [Click for support]

Time Machine: (What does this mean?)

Auto backup: YES

Volumes being backed up:

Macintosh HD: Disk size: 999.35 GB Disk used: 239.37 GB

Destinations:

Data [Network]

Total size: 2.00 TB

Total number of backups: 42

Oldest backup: 2015/03/14, 00:21

Last backup: 2015/10/16, 11:45

Size of backup disk: Adequate

Backup size 2.00 TB > (Disk used 239.37 GB X 3)

PAlmeida_1TB01 [Local]

Total size: 999.01 GB

Total number of backups: 89

Oldest backup: 2014/02/22, 00:46

Last backup: 2015/10/16, 10:25

Size of backup disk: Adequate

Backup size 999.01 GB > (Disk used 239.37 GB X 3)

Top Processes by CPU: (What does this mean?)

25% com.apple.WebKit.WebContent(22)

16% WindowServer

4% Safari

2% com.apple.WebKit.Networking

2% nsurlstoraged(2)

Top Processes by Memory: (What does this mean?)

3.79 GB com.apple.WebKit.WebContent(22)

711 MB kernel_task

647 MB Google Chrome Helper(9)

188 MB Safari

180 MB MozyHomeBackup

Virtual Memory Information: (What does this mean?)

64 MB Free RAM

7.93 GB Used RAM (1.06 GB Cached)

0 B Swap Used

Diagnostics Information: (What does this mean?)

Oct 16, 2015, 05:18:11 PM Self test - passed

Oct 16, 2015, 04:02:16 PM /Library/Logs/DiagnosticReports/MozyHomeBackup_2015-10-16-160216_[redacted].cpu _resource.diag [Click for details]

Oct 15, 2015, 07:52:27 PM ~/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_2015-10-15-195227_ [redacted].crash

Oct 15, 2015, 03:00:38 PM ~/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_2015-10-15-150038_ [redacted].crash

I still see there 2 red items:

User Launch Agents: (What does this mean?)

[failed] com.google.GoogleContactSyncAgent.plist [Click for support] [Click for details]

Top Processes by Memory: (What does this mean?)

3.79 GB com.apple.WebKit.WebContent(22)

Do you have addiitonal suggestions as how to address them?

Thanks, Pedro

Thanks Lex.

Google Chrome is necessary for me because in some situations, and contrarily to your experience, Safari presents problems. I understand, however, that the item GoogleContactSyncAgent may be inked to syncing my Mac's contacts with Google, where I actually have all the contacts stored and shared through multiple devices (including Android smartphone and iPad).

I haven't yet had the opportunity (and the courage) to go beyond restarting, shall probably do a longer shutdown trial tomorrow, and shall keep you posted. But FYI last time I restarted the computer froze when shutting down (it became extremely slow and unstable after having performed all the tasks), so I actually had to force shutdown and startup immediately on sequence.

Cheers,

Pedro

Deleted them, guess have none - do I need them? My vpn (through Citrix) seems to be working.

Done, thanks.

Talk again tomorrow

Here we are again, back to the drawing board, frozen at startup, apple logo showing but non-progressing (actually showing no start, even) bar below.

So the situation is, as far as its effects show and after all the fixes that were done, exactly the same as reported at start.

As I have an alternative machine to work with and have full file syncing between the two, I left the iMac on its frozen status for now. Maybe it will unfreeze after a couple of hours...? Actually, that's what I had to do yesterday when I shut it down, it would never move to real shutdown so I went out for dinner and eventually, when I came back, shutdown had completed. So the machine is clearly not working (?) as it should. Only systematic re-installations of the OS seem to do, meaning 1 hour for starting up the ****** beast.

Where do I go from here now? Maybe I should make a "hard reset" (i.e. start totally anew) to the machine... I wouldn't probably like to perform a recovery from the Time Machine as it might reproduce whatever is causing problems now. But I might use the settings of my MacBook Air to do it - by either importing them from the Time Machine (how can I import the settings from another Mac's Time Machine?) or, if I remember well, when we start a Mac anew we may instruct it to import settings from another Mac.

Hints on the above, or any other suggestions (please do not ask me to uninstall applications that are essential to me and my work and, besides, are up and running normally on my MacBook Air, as they were before upgrading to El Capitán on the now frozen iMac)?

Thanks, Pedro

Thanks Lex.

All you suggest would certainly take a lot of time and effort, to possibly still non conclusive results. Very honestly, I think I'll cut it short and move directly to a clean start and then import settings and apps from my MacBook. I had performed a disk check prior to having even started to post here. My time is short too though, and besides I have very frequent traveling absences (hence the MacBook Air), so it is likely that I'll take more than one week to do that kind of operation, which may be time consuming and not as linear as manufacturers always claim.

There might, however, exist other hardware issues (which I would find odd because of the absolute coincidence with the upgrade), and the hardware test should indeed be made anyway, I am besides 2 months from manufacturer's guarantee for the hardware, so if something is wrong better to act now while I am still covered.

I'll post here any news as they'll come.

Thanks again.

P.S.: Isn't there a way to return the status of this thread to "unsolved"?