I recently downloaded and installed OS X Mavericks 10.9 on my MacbookAir3,2 and have slower operating speed, especially very slow upload of e-mail attachments.  Anyone got a fix, or advice on self-diagnosing the underlying problem?

I recently downloaded and installed OS X Mavericks 10.9 on my MacbookAir3,2 and now seem to have slower operating speed, especially very slow upload of e-mail attachments.  Anyone got a fix, or advice on self-diagnosing the underlying problem?

Try my Mac Performance Guide.
If that doesn't help, post back here with the results of all the things you tried to do as part of that guide.

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