He revisado la pregunta askdifferent aquí: "Este ID de Apple es válido pero no es una cuenta de iCloud" - Odio abrir una nueva pregunta sobre este tema, pero ninguna de las respuestas o sugerencias me ha funcionado.
Puedo iniciar sesión en iCloud.com utilizando el ID y puedo acceder al correo, etc. sin problemas. He probado a iniciar sesión en iCloud en Preferencias del Sistema y me aparece el error del título. He intentado añadir el ID de iCloud al usuario en "Usuarios y Grupos" y también sin el ID de iCloud allí y me sale el mismo error. He reiniciado varias veces. He aplicado todas las actualizaciones de seguridad disponibles en el sistema.
Me he quedado sin cosas que probar... La información del sistema se muestra a continuación.
EtreCheck version: 3.0.6 (315)
Report generated 2016-10-26 10:54:44
Download EtreCheck from https://etrecheck.com
Runtime 9:19
Performance: Below Average
Click the [Support] links for help with non-Apple products.
Click the [Details] links for more information about that line.
Problem: Other problem
Hardware Information:
MacBook Pro (17-inch, 2.4GHZ)
[Technical Specifications] - [User Guide] - [Warranty & Service]
MacBook Pro - model: MacBookPro3,1
1 2.6 GHz Intel Core 2 Duo CPU: 2-core
4 GB RAM Upgradeable - [Instructions]
BANK 0/DIMM0
2 GB DDR2 SDRAM 667 MHz ok
BANK 1/DIMM1
2 GB DDR2 SDRAM 667 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Battery: Health = Check Battery - Cycle count = 111
Video Information:
GeForce 8600M GT - VRAM: 256 MB
Color LCD 1152 x 720
System Software:
OS X Mavericks 10.9.5 (13F1911) - Time since boot: less than an hour
Disk Information:
Hitachi HTS722020K9SA00 disk0 : (200.05 GB) (Rotational)
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / [Startup]: 199.06 GB (134.61 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
USB Information:
Apple Inc. Built-in iSight
Apple Inc. Bluetooth USB Host Controller
Logitech USB Receiver
Apple Computer Apple Internal Keyboard / Trackpad
Apple Computer, Inc. IR Receiver
Gatekeeper:
Mac App Store and identified developers
Kernel Extensions:
/System/Library/Extensions
[loaded] com.Logitech.Control Center.HID Driver (3.6.0 - SDK 10.6 - 2016-10-26) [Support]
[loaded] com.Logitech.Unifying.HID Driver (1.2.0 - SDK 10.6 - 2016-10-26) [Support]
System Launch Agents:
[loaded] com.apple.coremedia.videodecoder.plist (2010-10-21)
[not loaded] 5 Apple tasks
[loaded] 143 Apple tasks
[running] 36 Apple tasks
System Launch Daemons:
[failed] com.apple.DumpPanic.plist (2013-10-27)
[not loaded] 50 Apple tasks
[loaded] 137 Apple tasks
[running] 60 Apple tasks
Launch Agents:
[running] com.Logitech.Control Center.Daemon.plist (2012-05-24) [Support]
[loaded] com.google.keystone.agent.plist (2016-07-11) [Support]
[running] com.micromat.TechToolProAgent.plist (2014-07-10) [Support]
[loaded] com.oracle.java.Java-Updater.plist (2013-06-18) [Support]
[loaded] com.p5sys.jump.connect.agent.plist (2016-10-25) [Support]
Launch Daemons:
[loaded] com.adobe.fpsaud.plist (2016-09-23) [Support]
[loaded] com.google.keystone.daemon.plist (2016-08-31) [Support]
[running] com.micromat.TechToolProDaemon.plist (2014-07-10) [Support]
[loaded] com.oracle.java.Helper-Tool.plist (2013-06-18) [Support]
[running] com.p5sys.jump.connect.service.plist (2016-10-25) [Support]
User Launch Agents:
[loaded] com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.9169C628-3317-4620-AA58-0054BCCE8809.plist (2012-07-18)
User Login Items:
Dropbox Application (/Applications/Dropbox.app)
Internet Plug-ins:
Flip4Mac WMV Plugin: 2.4.0.11 (2011-12-13) [Support]
FlashPlayer-10.6: 23.0.0.185 - SDK 10.9 (2016-10-11) [Support]
QuickTime Plugin: 7.7.3 (2016-10-26)
Flash Player: 23.0.0.185 - SDK 10.9 (2016-10-11) Outdated! Update
Java Applet: Unknown (2011-08-11)
Default Browser: 537 - SDK 10.9 (2014-10-02)
LogitechDeviceDetection: 1.0.0.76 - SDK 10.7 (2012-04-07) [Support]
Loki: 3.4.2.20 (2011-08-11) [Support]
Google Earth Web Plug-in: 7.1 (2015-07-24) [Support]
Silverlight: 4.0.60531.0 (2011-12-13) [Support]
JavaAppletPlugin: Java 8 Update 111 build 14 (2016-10-23) Check version
Safari Extensions:
jbsearch - jbsearch - http://www.yahoo.com (2015-04-05)
3rd Party Preference Panes:
Flash Player (2016-09-23) [Support]
Flip4Mac WMV (2011-06-30) [Support]
Java (2016-10-23) [Support]
Logitech Control Center (2012-09-20) [Support]
TechTool Protection (2014-07-10) [Support]
Time Machine:
Skip System Files: NO
Mobile backups: OFF
Auto backup: NO - Auto backup turned off
Volumes being backed up:
Macintosh HD: Disk size: 199.06 GB Disk used: 64.44 GB
Destinations:
Big 500 [Local]
Total size: 499.74 GB
Total number of backups: 2
Oldest backup: 11/5/12, 1:01 AM
Last backup: 11/5/12, 1:01 AM
Size of backup disk: Adequate
Backup size 499.74 GB > (Disk used 64.44 GB X 3)
Top Processes by CPU:
34% mdworker(4)
20% JumpConnect(2)
3% WindowServer
2% Dropbox
1% fontd(2)
Top Processes by Memory:
172 MB Dropbox
147 MB mds_stores
119 MB com.apple.WebKit.WebContent
90 MB JumpConnect(2)
86 MB ocspd
Virtual Memory Information:
0 B Free RAM
0 B Used RAM (1.83 GB Cached)
0 B Swap Used
Diagnostics Information:
Oct 26, 2016, 10:29:08 AM Self test - passed
Oct 25, 2016, 06:34:46 PM /Library/Logs/DiagnosticReports/powerd_2016-10-25-183446_[redacted].crash
/System/Library/CoreServices/powerd.bundle/powerd
Oct 24, 2016, 06:01:17 PM /Library/Logs/DiagnosticReports/powerd_2016-10-24-180117_[redacted].crash
Oct 24, 2016, 05:45:06 PM /Library/Logs/DiagnosticReports/powerd_2016-10-24-174506_[redacted].crash
Oct 23, 2016, 06:33:43 PM /Library/Logs/DiagnosticReports/powerd_2016-10-23-183343_[redacted].crash
Oct 23, 2016, 06:10:16 PM /Library/Logs/DiagnosticReports/powerd_2016-10-23-181016_[redacted].crash
