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Does activating 8 disable 7?

• To: mathgroup at smc.vnet.net
• Subject: [mg113881] Does activating 8 disable 7?
• From: AES <siegman at stanford.edu>
• Date: Wed, 17 Nov 2010 05:27:44 -0500 (EST)

Mathematica 8 arrived yesterday (that is, I downloaded the 1 GB disk 
image which I get for free through Premier Service).

I'm just starting the drawn-out process of moving from a 2007-vintage 
MacBook running Leopard to a newly purchased MacBook Pro running Snow 
Leopard, doing this one app at a time rather than via a batch 
"migration" in the hope of leaving behind all the cruft that may have 
accumulated in the older MacBook during three previous system upgrades.

If I install and activate Mathematica 8 on the new MacBook Pro (only), 
will that somehow disable or deactivate the copy of Mathematica 7 that's 
been left behind on the old MacBook (both Macs talk to our household 
WiFi LAN)?

Or will it maybe just block one of them from starting up any time the 
other is running?  

I'd like to have an overlap period during which the older machine is 
still usable while the newer machine gets up to speed.