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Assuming you have not modified the default behaviour in any way, you should be able to scroll through a list of your previous commands simply by hitting the up cursor key. There are so many alternati …

If your data is in any way important, you should consider taking proper backups on a reasonable schedule. If you are not familiar with the tools available, then the key is to use something simple th …

You could try this: http://www.cgsecurity.org/wiki/TestDisk which is free undelete software, although it operates at the command line level. If you are happy with Python I will assume you are familia …

You could upgrade to Lion, as the behaviour for extended key presses has changed. If I hold down the C key instead of giving me the old "cccccccc" etc thing, it provides a small popover menu thing to …

Note, some of the info in this answer was cribbed from here: Mac OS X 10.6 Snow Leopard was the last OS to support 32 bit CPU architectures, like the Core Solo, and Core Duo (not Core 2 Duo) processo …

Not aware of anything quite like BeTwin, but you may not be aware that is is possible to run 2 user accounts simultaeniously out of the box without the need for any extra software, at least in Lion (A …

The two technologies share nothing except the name and cannot be directly compared. The old Filevault created a spare bundle image file for your home folder, which was encrypted. The new one simply …

Yes, if it's an install disc that was either a boxed copy, or an up-to-date CD, no if it was just the disc that came with the machine unless the model number of the machine is the exact same one. The …

I have the same machine & spec, and have not noticed any slowdown when operating at the latest supported version of Lion when compared with previous versions. Of course, this is purely anecdotal, but …

You won't break Bootcamp by upgrading Mac OS X, but it may complain on attempting the upgrade that it cannot do it. Some configurations of Bootcamp from older macs put the partition for Bootcamp as t …

An upgrade in place should be absolutely fine. I'm sure you can find anecdotal evidence of it crashing for some people, but it's not something that crops on on here more than occasionally. Note that …

Take a look at BackupLoupe: http://www.soma-zone.com/BackupLoupe/ The blurb on the website describes what it can do far more eloquently than I can, but to summarise it's commercial software that you c …