SEPTEMBER 2020 MACWORLD 117want a border and drop shadow, you can
use the Terminal to make that change
permanent. Open Applications → Utilities →
Terminal and then copy and paste each of
these lines in turn:
defaults write com.apple.
screencapture disable-shadow true
killall SystemUIServer
You can reverse that by swapping true
for false in the line above and pasting in
that line and the next again.
The downside of this change is that you
can’t retain the border while getting rid of
the drop shadow, which is useful for light-
colored windows or those with white
edges. If you place the image into other
software, you can typically set a border
for it, as in Pages. Or, you can get an
inexpensive photo editor, like Pixelmator
(go.macworld.com/pmtr) or
GraphicConverter (go.macworld.com/gcon),
which makes it easy to add a bitmap border
around the edge of an image.HOW TO GET CERTIFIED FOR A
HARD DRIVE YOU ERASED
It’s relatively easy to erase the contents
of a drive on a Mac. But what if you’re
asked to prove you did so? Some
companies, government agencies, and
other organizations have an internal or
legal requirement to erase drives
securely. While the IT department may
handle this at large organizations, you
might be asked (as one reader was) to
provide documentation before disposing
of a company computer.
Fortunately,
this isn’t an odd
request. And it’s
not terribly
expensive even
for an individual
to conform to.
There’s a
category of
software that’s
available across
many different
platforms from
Adding back a border is easy in software like GraphicConverter. many firms that