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Fix for "Mathematica has quit unexpectedly" on Shift+Option start-up

  • To: mathgroup at
  • Subject: [mg108889] Fix for "Mathematica has quit unexpectedly" on Shift+Option start-up
  • From: Paul Makepeace <paulm at>
  • Date: Tue, 6 Apr 2010 07:23:50 -0400 (EDT)

WRI support have suggested to me on several occasions the Shift+Option
restart procedure to reset Mathematica somewhat. This however was
causing Mathematica to crash on start-up. Here's the solution that
worked for me,


When I try the Shift+Option restart Mathematica "quits unexpectedly"
(consistently reproducible; see crash stats below). Are you interested
in the full stack trace? Here is the start of it,

Process:         Mathematica [745]
Path:            /Applications/
Identifier:      com.wolfram.Mathematica
Version: (7.0)
Code Type:       X86 (Native)
Parent Process:  launchd [154]

Date/Time:       2010-04-05 12:26:35.969 -0700
OS Version:      Mac OS X 10.6.3 (10D573)
Report Version:  6

Interval Since Last Report:          145 sec
Crashes Since Last Report:           3
Per-App Interval Since Last Report:  43 sec
Per-App Crashes Since Last Report:   3
Anonymous UUID:                      B9E0EC3D-76D5-4C=

Exception Type:  EXC_CRASH (SIGBUS)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread:  1  Dispatch queue:


On Mon, Apr 5, 2010 at 08:30,  <support at> wrote:


That's not so good...We may be looking at a larger corruption of the user
base directory.  Our best bet it to have these directories rebuilt

There are 2 "Mathematica" directories that we'll want to rename
"Mathematica-old"  These directories should be located in:

/Users/<your user name>/Library

Rename these folder (with Mathematica shutdown) and then try launching the
application again (you don't need to hold down SHIFT+OPTION).  You should
be prompted for your license information (if you have it handy, you can
re-enter it, otherwise quit Mathematica and copy the 'mathpass' file from
/Users/<your user name>/Library/Mathematica-old/Licensing to the newly
created /Users/<your user name>/Library/Mathematica/Licensing and then
start Mathematica back up.


Hope that helps,

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