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Install problem, 6.0, Mac OS 10.4.10: No kernel connect?
Installed Mathematica 6.0.1 from purchased CD to Applications folder on MacBook running OS 10.4.10 and having 5.1 already installed -- installation process all seemed to go OK. Dbl-clicked the app, it started up; supplied Password as requested. The "About Mathematica" box shows correct name, license number, etc.; opening an old notebook produces green bar across top suggesting a compatibility scan; new notebook window can also be opened -- but invoking any menu command or attempting to execute any cell leads to dialog box: "Mathematica could not establish a connection to the kernel. Kernel: Local. Low-level MathLink error: Launch failed." Same result after clearing the decks and installing from the 6.0 CD I was first sent some months ago. I've emailed Wolfram, but any suggestions to try while I wait? [Restarting the Mac doesn't help. Fortunately 5.1 still seems to run so I'm not dead in the water.]