here are some recommendations i have from when i was using ae7 on a macpro.
disable opengl for previews altogether (preferences>previews). any opengl accelerated effect will crash ae when you apply them to a layer (unless it is an adjustment layer for some reason). disabling opengl will prevent that from happening.
also, watch out for the cycore effects (any effect with ‘cc’ in front of it), they are pretty unstable with ae7 on an intel mac. it won’t crash every time, but it will crash more often, so save more often when using them.
don’t run any other powerpc (non-native intel mac) based application when using ae7. the powerpc emulation software (rosetta) has a limit on the amount of ram that it can allocate for all powerpc based apps, so let ae use all that it can by not running any other powerpc software (like photoshop cs2 and earlier).
lastly, i would recommend upgrading to cs3. most of your ae problems will probably go away. mine did….
as far as the other software issues, photoshop may be suffering the same powerpc emulation woes as ae7. i haven’t used motion for a while (never on an intel mac) but i remember it to be somewhat unstable as your project got more complex. the browsers may be suffering from java or plugin version issues, make sure you have the latest versions.
it is a little suspicious taht several apps are giving you problems… if you are concerned about hardware problems, running the hardware test from the osx instal disk may be a good idea. run the extended test (it will take a long time).
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW