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From: Paul Makepeace on 6 Apr 2010 07:23
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,

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Hello,

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/Mathematica.app/Contents/MacOS/M=
athematica
Identifier: com.wolfram.Mathematica
Version: 7.0.1.1214005 (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=
86-A318-27D73578E779

Exception Type: EXC_CRASH (SIGBUS)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread: 1 Dispatch queue: com.apple.libdispatch-manager

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On Mon, Apr 5, 2010 at 08:30, <support(a)wolfram.com> wrote:

Paul,

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
entirely.

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

/Library
and
/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.

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Hope that helps,
Paul

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