MacOS – Can’t boot normal or from recovery HD

Yesterday my MacBook Pro 15" Retina stopped booting. I see the Apple logo and a progress bar which gets stuck at about 10%.

What I tried so far:

• Booting in recovery mode – same, progress bar stuck at 10%
• Booting in internet recovery – loads until a grey screen with the
  Apple logo. Nothing happens after that
• Booting in single-user mode and repair disk with fsck – did that,
  didn't help
• Booting in safe mode – works, I verified and repaired the disk
  with Disk Utility but the problem persists
• Booting in verbose mode to see where the process gets stuck – booting
  proccess stops at various points each time. I tried googling all
  these steps where it get stuck but I always end up in hackintosh
  boards and blogs (OSX on PC's)
• Creating a bootable USB disk (Recovery USB) and it also get stuck at the
  10% progress bar

I Was able to create a Time Machine backup in safe mode. So data loss isn't really the problem here. At this point i would wipe the disk and reinstall Yosemite if necessary. But without getting into the recovery HD I don't know how.

I do not have a second machine to connect to the MacBook so Target Mode isn't an option for me.

EDIT 1: After removing everything from startup the problem still persists.

EDIT 2: starting in verbose mode i now see kernel panic

panic(cpu 2 caller) "Spinlock acquisition timed out"
Kernel extension in backtrace: com.apple.kec.pthread
BSD process name corresponding to current htread: taskgated

EDIT 3: So booting in verbose over and over again it seems like booting stops alway either at kernel panic mentioned in EDIT 2, or at

IOBluetoothcontroller – start – loaded

or a new kernel panic that appears sometimes

"TLB invalidation timeout" "CPU(s) failed repond to interrupts, unresponsive CPU bitmam: 0x53, NMIPI acks: orgi: 0x0, now: 0x0"@7SourceCache/xnu/xnu-2782.1.97/osfmk/x86_64/pmap.c:247"
BSD proccess name corresponding to current thread: configd

EDIT 4: Found an App called Etre check which seems to be used in the Apple support community. I post the output here.

EtreCheck version: 2.2 (132) Report generated 7/5/15, 11:13 AM
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: ℹ️
MacBook Pro (Retina, 15-inch, Mid 2014) (Technical Specifications)
MacBook Pro – model: MacBookPro11,3
1 2.5 GHz Intel Core i7 CPU: 4-core
16 GB RAM Not upgradeable
BANK 0/DIMM0
8 GB DDR3 1600 MHz ok
BANK 1/DIMM0
8 GB DDR3 1600 MHz ok
Bluetooth: Good – Handoff/Airdrop2 supported
Wireless: en0: 802.11 a/b/g/n/ac
Battery: Health = Normal – Cycle count = 270 – SN = C01427403YPF9CRAM

Video Information: ℹ️
Intel Iris Pro
NVIDIA GeForce GT 750M – VRAM: 2048 MB

System Software: ℹ️
OS X 10.10.1 (14B25) – Time since boot: 0:11:41

Disk Information: ℹ️
APPLE SSD SM0512F disk0 : (500.28 GB)
EFI (disk0s1) : 210 MB
Macintosh HD (disk0s2) / : 499.42 GB (254.25 GB free)
Recovery HD (disk0s3) [Recovery]: 650 MB

USB Information: ℹ️
Apple Internal Memory Card Reader
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller

Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus

Configuration files: ℹ️
/etc/hosts – Count: 13

Gatekeeper: ℹ️
Mac App Store and identified developers

Kernel Extensions: ℹ️
/Library/Application Support/Hotspot Shield
[not loaded] com.anchorfree.tun (1.1.1 – SDK 10.8) [Click for support]

    /Library/Application Support/VirtualBox
[not loaded]    org.virtualbox.kext.VBoxDrv (4.3.18) [Click for support]
[not loaded]    org.virtualbox.kext.VBoxNetAdp (4.3.18) [Click for support]
[not loaded]    org.virtualbox.kext.VBoxNetFlt (4.3.18) [Click for support]
[not loaded]    org.virtualbox.kext.VBoxUSB (4.3.18) [Click for support]

Startup Items: ℹ️
WiFiUtilityStartUp: Path: /System/Library/StartupItems/WiFiUtilityStartUp
MobileBrServ: Path: /Library/StartupItems/MobileBrServ
Startup items are obsolete in OS X Yosemite

Problem System Launch Daemons: ℹ️
[failed] com.apple.watchdogd.plist [Click for details]

Launch Agents: ℹ️
[not loaded] com.adobe.AAM.Updater-1.0.plist [Click for support]
[not loaded] com.oracle.java.Java-Updater.plist [Click for support]
[not loaded] org.macosforge.xquartz.startx.plist [Click for support]

Launch Daemons: ℹ️
[not loaded] com.adobe.fpsaud.plist [Click for support]
[not loaded] com.adobe.SwitchBoard.plist [Click for support]
[not loaded] com.anchorfree.ajaxserver.plist [Click for support]
[not loaded] com.BlueStacks.AppPlayer.bstservice_helper.plist [Click for support]
[not loaded] com.gopro.stereomodestatus.plist [Click for support]
[not loaded] com.oracle.java.Helper-Tool.plist [Click for support]
[not loaded] org.macosforge.xquartz.privileged_startx.plist [Click for support]
[not loaded] org.virtualbox.startup.plist [Click for support]
[not loaded] SwitchboardService.plist [Click for support]

User Launch Agents: ℹ️
[not loaded] com.google.keystone.agent.plist [Click for support]
[not loaded] com.spotify.webhelper.plist [Click for support]
[not loaded] org.virtualbox.vboxwebsrv.plist [Click for support]

User Login Items: ℹ️
AppTrap Application (/Library/PreferencePanes/AppTrap.prefPane/Contents/Resources/AppTrap.app)

Internet Plug-ins: ℹ️
AdobeExManDetect: Version: AdobeExManDetect 1.1.0.0 – SDK 10.7 [Click for support]
FlashPlayer-10.6: Version: 18.0.0.194 – SDK 10.6 [Click for support]
Default Browser: Version: 600 – SDK 10.10
AdobePDFViewerNPAPI: Version: 10.1.14 [Click for support]
AdobePDFViewer: Version: 10.1.14 [Click for support]
Flash Player: Version: 18.0.0.194 – SDK 10.6 [Click for support]
QuickTime Plugin: Version: 7.7.3
JavaAppletPlugin: Version: Java 8 Update 45 Check version

User internet Plug-ins: ℹ️
BlueStacks Install Detector: Version: Unknown
Google Earth Web Plug-in: Version: 7.1 [Click for support]

Audio Plug-ins: ℹ️
DVCPROHDAudio: Version: 1.3.2

3rd Party Preference Panes: ℹ️
AppTrap [Click for support]
Flash Player [Click for support]
GoPro [Click for support]
Java [Click for support]

Time Machine: ℹ️
Skip System Files: NO
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 499.42 GB Disk used: 245.17 GB
Destinations:
Backup & Download [Local]
Total size: 999.83 GB
Total number of backups: 10
Oldest backup: 2015-06-16 13:46:58 +0000
Last backup: 2015-07-03 09:43:35 +0000
Size of backup disk: Adequate
Backup size 999.83 GB > (Disk used 245.17 GB X 3)

Top Processes by CPU: ℹ️
2% fontd
1% WindowServer
1% mds
0% firefox
0% nsurlstoraged(2)

Top Processes by Memory: ℹ️
945 MB kernel_task
492 MB firefox
115 MB WindowServer
82 MB softwareupdated
82 MB Dock

Virtual Memory Information: ℹ️
13.00 GB Free RAM
3.19 GB Used RAM
0 B Swap Used

Diagnostics Information: ℹ️
Jul 5, 2015, 11:04:14 AM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-05-110414_[redacted].crash
Jul 5, 2015, 11:02:06 AM Self test – passed
Jul 4, 2015, 11:26:56 AM /Users/[redacted]/Library/Logs/DiagnosticReports/garcon_2015-07-04-112656_[redacted].crash
Jul 4, 2015, 10:02:59 AM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-04-100259_[redacted].crash
Jul 4, 2015, 10:02:48 AM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-04-100248_[redacted].crash
Jul 4, 2015, 10:02:38 AM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-04-100238_[redacted].crash
Jul 4, 2015, 10:02:29 AM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-04-100229_[redacted].crash
Jul 3, 2015, 08:26:10 PM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-03-202610_[redacted].crash
Jul 3, 2015, 08:26:00 PM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-03-202600_[redacted].crash
Jul 3, 2015, 08:25:51 PM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-03-202551_[redacted].crash
Jul 3, 2015, 08:23:05 PM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-03-202305_[redacted].crash
Jul 3, 2015, 08:22:55 PM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-03-202255_[redacted].crash
Jul 3, 2015, 08:22:45 PM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-03-202245_[redacted].crash
Jul 3, 2015, 08:22:34 PM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-03-202234_[redacted].crash
Jul 3, 2015, 08:22:24 PM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-03-202224_[redacted].crash
Jul 3, 2015, 08:22:15 PM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-03-202215_[redacted].crash
Jul 3, 2015, 07:53:04 PM /Users/[redacted]/Library/Logs/DiagnosticReports/fontd_2015-07-03-195304_[redacted].crash
Jul 2, 2015, 01:21:49 PM /Library/Logs/DiagnosticReports/discoveryd_2015-07-02-132149_[redacted].crash