what is com.apple.icbaccountsd.plist

Here's my EtreCheck:

Hardware Information: ℹ️

MacBook Pro (17-inch, Mid 2010) (Technical Specifications)

MacBook Pro - model: MacBookPro6,1

1 2.66 GHz Intel Core i7 CPU: 2-core

4 GB RAM Upgradeable

BANK 0/DIMM0

2 GB DDR3 1067 MHz ok

BANK 1/DIMM0

2 GB DDR3 1067 MHz ok

Bluetooth: Old - Handoff/Airdrop2 not supported

Wireless: en1: 802.11 a/b/g/n

Battery: Health = Check Battery - Cycle count = 503 - SN = 9G01500KYDN5A

Video Information: ℹ️

Intel HD Graphics

NVIDIA GeForce GT 330M - VRAM: 512 MB

Color LCD 1920 x 1200

System Software: ℹ️

OS X 10.10.3 (14D136) - Time since boot: one day 0:3:19

Disk Information: ℹ️

ST9500420ASG disk0 : (500.11 GB)

EFI (disk0s1) <not mounted> : 210 MB

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

Macintosh HD (disk1) / : 498.88 GB (256.19 GB free)

Core Storage: disk0s2 499.25 GB Online

MATSHITADVD-R UJ-898

USB Information: ℹ️

Logitech USB Receiver

Apple Inc. Apple Internal Keyboard / Trackpad

Apple Inc. BRCM2070 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Computer, Inc. IR Receiver

Apple Inc. Built-in iSight

Configuration files: ℹ️

/etc/hosts - Count: 7900 - Corrupt!

Gatekeeper: ℹ️

Mac App Store and identified developers

Kernel Extensions: ℹ️

/System/Library/Extensions

[loaded] com.Logitech.Control Center.HID Driver (3.2.0) [Click for support]

[loaded] com.Logitech.Unifying.HID Driver (1.1.0) [Click for support]

[not loaded] com.caiaq.driver.NIUSBAudio2DJDriver (2.3.7) [Click for support]

[not loaded] com.caiaq.driver.NIUSBAudio4DJDriver (2.3.9) [Click for support]

[not loaded] com.caiaq.driver.NIUSBHardwareDriver (2.3.9) [Click for support]

[loaded] com.rim.driver.BlackBerryUSBDriverInt (0.0.74) [Click for support]

[not loaded] com.seagate.driver.PowSecDriverCore (5.0.1) [Click for support]

/System/Library/Extensions/Seagate Storage Driver.kext/Contents/PlugIns

[not loaded] com.seagate.driver.PowSecLeafDriver_10_4 (5.0.1) [Click for support]

[not loaded] com.seagate.driver.PowSecLeafDriver_10_5 (5.0.1) [Click for support]

[not loaded] com.seagate.driver.SeagateDriveIcons (5.0.1) [Click for support]

/Users/[redacted]/Library/Services/ToastIt.service/Contents/MacOS

[not loaded] com.roxio.TDIXController (2.0) [Click for support]

Problem System Launch Agents: ℹ️

[failed] com.apple.icbaccountsd.plist [Click for details]

[loaded] com.paragon.NTFS.auth.plist [Click for support]

Problem System Launch Daemons: ℹ️

[failed] com.apple.mtrecorder.plist

Launch Agents: ℹ️

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

[running] com.Logitech.Control Center.Daemon.plist [Click for support]

Launch Daemons: ℹ️

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

User Launch Agents: ℹ️

[loaded] com.bittorrent.uTorrent.plist [Click for support]

[loaded] com.valvesoftware.steamclean.plist [Click for support]

User Login Items: ℹ️

EEventManager Application (/Applications/Epson Software/Event Manager.app/Contents/Resources/Assistants/Event Manager/EEventManager.app)

Internet Plug-ins: ℹ️

o1dbrowserplugin: Version: 5.41.0.0 - SDK 10.8 [Click for support]

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

Default Browser: Version: 600 - SDK 10.10

Flip4Mac WMV Plugin: Version: 2.4.4.2 [Click for support]

Unity Web Player: Version: UnityPlayer version 2.6.1f3 [Click for support]

Silverlight: Version: 5.1.30317.0 - SDK 10.6 [Click for support]

DivXBrowserPlugin: Version: 2.0 [Click for support]

PanasonicDrmPlugin_1_2: Version: 1.3.1.1 - SDK 10.6 [Click for support]

QuickTime Plugin: Version: 7.7.3

iPhotoPhotocast: Version: 7.0

googletalkbrowserplugin: Version: 5.41.0.0 - SDK 10.8 [Click for support]

AdobePDFViewer: Version: 10.1.2 [Click for support]

GarminGpsControl: Version: 4.0.1.0 Release - SDK 10.6 [Click for support]

JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version

Audio Plug-ins: ℹ️

DVCPROHDAudio: Version: 1.3.2

3rd Party Preference Panes: ℹ️

Flip4Mac WMV [Click for support]

Logitech Control Center [Click for support]

Paragon NTFS for Mac ® OS X [Click for support]

Time Machine: ℹ️

Skip System Files: NO

Mobile backups: OFF

Auto backup: NO - Auto backup turned off

Volumes being backed up:

Macintosh HD: Disk size: 498.88 GB Disk used: 242.69 GB

Destinations:

Safety [Local]

Total size: 499.97 GB

Total number of backups: 8

Oldest backup: 2011-10-13 19:24:47 +0000

Last backup: 2015-05-20 20:56:05 +0000

Size of backup disk: Too small

Backup size 499.97 GB < (Disk used 242.69 GB X 3)

Top Processes by CPU: ℹ️

21% Google Chrome Helper(6)

3% coreaudiod

3% Google Chrome

2% WindowServer

0% hidd

Top Processes by Memory: ℹ️

868 MB Google Chrome Helper(5)

467 MB kernel_task

164 MB Google Chrome

94 MB Mail

90 MB Skype

Virtual Memory Information: ℹ️

54 MB Free RAM

3.82 GB Used RAM

20 MB Swap Used

Diagnostics Information: ℹ️

Jun 16, 2015, 08:45:30 AM /Users/[redacted]/Library/Logs/DiagnosticReports/accountsd_2015-06-16-084530_[r edacted].crash

Jun 16, 2015, 08:37:28 AM /Users/[redacted]/Library/Logs/DiagnosticReports/accountsd_2015-06-16-083728_[r edacted].crash

Jun 16, 2015, 08:34:28 AM /Users/[redacted]/Library/Logs/DiagnosticReports/accountsd_2015-06-16-083428_[r edacted].crash

Jun 16, 2015, 08:33:04 AM /Users/[redacted]/Library/Logs/DiagnosticReports/accountsd_2015-06-16-083304_[r edacted].crash

Jun 16, 2015, 08:30:59 AM /Users/[redacted]/Library/Logs/DiagnosticReports/accountsd_2015-06-16-083059_[r edacted].crash

Jun 15, 2015, 11:37:11 AM Self test - passed

Jun 13, 2015, 02:11:14 PM /Users/[redacted]/Library/Logs/DiagnosticReports/cloudd_2015-06-13-141114_[reda cted].crash

Jun 13, 2015, 12:02:06 PM /Users/[redacted]/Library/Logs/DiagnosticReports/accountsd_2015-06-13-120206_[r edacted].crash

Jun 13, 2015, 12:00:14 PM /Users/[redacted]/Library/Logs/DiagnosticReports/accountsd_2015-06-13-120014_[r edacted].crash

Jun 13, 2015, 11:52:22 AM /Users/[redacted]/Library/Logs/DiagnosticReports/accountsd_2015-06-13-115222_[r edacted].crash

Jun 13, 2015, 11:49:43 AM /Users/[redacted]/Library/Logs/DiagnosticReports/accountsd_2015-06-13-114943_[r edacted].crash

Have just manually deleted some Blackberry crud, trying to eliminate the last few hiccups, my hosts file is a list of spammers and adclick type crap.

Any help for this?

It appears to be containing your iCloud-synched Accounts that you can edit in the System Preferences or in Mail.app.

It is accompanied by icbaccountsd.plist inside ~/Library/SyncedPreferences, with both containing matching data.

I had a problem where a long-deleted account caused to frequently pop up a "invalid certificate" warning about the old account's domain address. So, despite the fact that I told OSX to stop using that account, it still kept on checking that mail server's (now-invalid) credentials, apparently.

The deleted account was not listed in Mail nor the System Preferences Accounts any more, so I could not further delete it.

I had to open both said plist files in a plain text editor (e.g. BBEdit), find the offending entries and remove them from both files at the same time, then restart the Mac. (If you have trouble removing the particular entries, try instead to rename the offending domain names into something that doesn't exist.)