Closed Immediate crash when starting launcher

As of the March 6 build, the Nightly launcher is crashing immediately whenever I click to launch it in Steam. I'm using Mac OS X 10.10.5, if that helps. I've tried getting rid of my player, universe, and config files, to no avail. I'm hesitant to try reinstalling because the last time I tried that it messed up, so if no fixes come up I'll just wait a couple days and see if it fixes itself.

Process: launcher [1635]
Path: /Users/USER/Library/Application Support/Steam/*/Launcher.app/Contents/MacOS/launcher
Identifier: com.chucklefish
Version: ???
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: launcher [1635]
User ID: 502

Date/Time: 2016-03-06 15:51:06.469 -0600
OS Version: Mac OS X 10.10.5 (14F1605)
Report Version: 11
Anonymous UUID: 2BF8A255-11AD-8329-98ED-DB9355C3CB65

Sleep/Wake UUID: F5D64EAE-EE82-4E67-97CC-6174D428381F

Time Awake Since Boot: 55000 seconds
Time Since Wake: 650 seconds

Crashed Thread: 0

Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000

Application Specific Information:
dyld: launch, loading dependent libraries
DYLD_FALLBACK_LIBRARY_PATH=/Applications/Steam.app/Contents/MacOS:/Users/miranda/Library/Application Support/Steam/steamapps/common/Starbound - Unstable:/Users/miranda/Library/Application Support/Steam/steamapps/common/Starbound - Unstable/bin:/usr/local/lib:/lib:/usr/lib
DYLD_INSERT_LIBRARIES=/Applications/Steam.app/Contents/MacOS/gameoverlayrenderer.dylib:/Applications/Steam.app/Contents/MacOS/steamloader.dylib
DYLD_LIBRARY_PATH=

Dyld Error Message:
Library not loaded: @executable_path/../Frameworks/QtWebEngineWidgets.framework/Versions/5/QtWebEngineWidgets
Referenced from: /Users/USER/Library/Application Support/Steam/*/Launcher.app/Contents/MacOS/launcher
Reason: image not found

Binary Images:
0x7fff6eae7000 - 0x7fff6eb1d887 dyld (353.2.3) <D9967621-6378-381B-A47B-5085EE476B62> /usr/lib/dyld

Model: iMac7,1, BootROM IM71.007A.B03, 2 processors, Intel Core 2 Duo, 2.4 GHz, 4 GB, SMC 1.21f4
Graphics: ATI Radeon HD 2600 Pro, ATI,RadeonHD2600, PCIe, 256 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR2 SDRAM, 667 MHz, 0x7F98000000000000, 0x4B494E4753544F4E20202020202020202020
Memory Module: BANK 1/DIMM1, 2 GB, DDR2 SDRAM, 667 MHz, 0x7F98000000000000, 0x4B494E4753544F4E20202020202020202020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x88), Broadcom BCM43xx 1.0 (5.10.131.36.16)
Bluetooth: Version 4.3.6f3 16238, 3 services, 26 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: ST3500418ASQ, 500.11 GB
Parallel ATA Device: OPTIARC DVD RW AD-5630A
USB Device: iPhone
USB Device: Keyboard Hub
USB Device: Apple Optical USB Mouse
USB Device: Apple Keyboard
USB Device: Built-in iSight
USB Device: Bluetooth USB Host Controller
USB Device: IR Receiver
Thunderbolt Bus:

 

The March 6th update is broken. On Windows it fails to complete because it's causing a disk write error in Steam, ostensibly because of some of the OSX elements. It stands to reason it'd also cause problems on OSX itself.

 

WINDOWS

Games have been downloaded to Program Files (x86) \ Steam \ steamapps \ downloading
Steam will not cut paste


giraffe storage has been changed to storage

This has changed

 

Unrelated to the problem at hand, but - ooh, is the pony modpack still working?

 

Disk write error problem can be solved ， I am here to re-download the game from Program Files (x86) \ Steam \ steamapps \ downloading where made new night Update Normal can enter the game