<s>
Quick	B-Operating_System
Look	I-Operating_System
is	O
a	O
quick	O
preview	O
feature	O
developed	O
by	O
Apple	O
Inc	O
.	O
which	O
was	O
introduced	O
in	O
its	O
operating	B-General_Concept
system	I-General_Concept
Mac	B-Application
OS	I-Application
X	I-Application
10.5	I-Application
Leopard	I-Application
.	O
</s>
<s>
While	O
macOS	B-Application
's	O
Finder	B-Application
has	O
always	O
had	O
smaller	O
previews	O
in	O
Get	O
Info	O
windows	O
or	O
column	O
view	O
,	O
Quick	B-Operating_System
Look	I-Operating_System
allows	O
users	O
to	O
look	O
at	O
the	O
contents	O
of	O
a	O
file	O
at	O
full	O
or	O
near-full	O
size	O
in	O
the	O
Finder	B-Application
,	O
depending	O
on	O
the	O
size	O
of	O
the	O
document	O
relative	O
to	O
the	O
screen	O
resolution	O
.	O
</s>
<s>
It	O
can	O
preview	O
files	O
such	O
as	O
PDFs	B-Application
,	O
HTML	B-Language
,	O
QuickTime	B-Application
readable	I-Application
media	I-Application
,	O
plain	O
text	O
and	O
RTF	O
text	O
documents	O
,	O
iWork	B-Application
(	O
Keynote	B-Protocol
,	O
Pages	B-Application
,	O
and	O
Numbers	B-Operating_System
)	O
documents	O
,	O
ODF	B-Application
documents	O
,	O
Microsoft	B-Application
Office	I-Application
(	O
Word	B-Application
,	O
Excel	B-Application
,	O
and	O
PowerPoint	B-Application
)	O
files	O
(	O
including	O
OOXML	B-Operating_System
)	O
,	O
and	O
RAW	B-Application
camera	O
images	O
.	O
</s>
<s>
Quick	B-Operating_System
Look	I-Operating_System
can	O
also	O
be	O
opened	O
in	O
full	O
screen	O
and	O
launched	O
from	O
the	O
command	B-Application
line	I-Application
.	O
</s>
<s>
Additionally	O
,	O
multi-page	O
documents	O
like	O
PowerPoint	B-Application
slide	O
shows	O
can	O
be	O
navigated	O
using	O
the	O
slide	O
previews	O
at	O
the	O
side	O
of	O
the	O
preview	O
window	O
.	O
</s>
<s>
Quick	B-Operating_System
Look	I-Operating_System
technology	O
is	O
implemented	O
throughout	O
the	O
Apple	O
suite	O
of	O
software	O
starting	O
with	O
Mac	B-Application
OS	I-Application
X	I-Application
10.5	I-Application
,	O
including	O
iChat	B-Protocol
Theater	I-Protocol
,	O
Time	B-Operating_System
Machine	I-Operating_System
,	O
and	O
Finder	B-Application
's	O
Cover	O
Flow	O
.	O
</s>
<s>
Quick	B-Operating_System
Look	I-Operating_System
APIs	O
are	O
available	O
to	O
developers	O
via	O
the	O
Quick	B-Operating_System
Look	I-Operating_System
framework	O
on	O
iOS	O
and	O
as	O
part	O
of	O
the	O
Quartz	B-Operating_System
framework	I-Operating_System
on	O
the	O
Mac	O
.	O
</s>
<s>
Since	O
its	O
debut	O
,	O
Quick	B-Operating_System
Look	I-Operating_System
has	O
included	O
a	O
number	O
of	O
generators	O
for	O
common	O
file	O
types	O
.	O
</s>
<s>
Format	O
Version	O
introduced	O
Notes	O
AAC	B-Application
10.5	O
Cover	O
art	O
in	O
icon	O
view	O
and	O
can	O
play	O
back	O
audio	O
in	O
full	O
preview	O
.	O
</s>
<s>
Adobe	B-Operating_System
Photoshop	I-Operating_System
10.5	O
AIFF	O
10.5	O
Apple	O
Icon	O
Image	O
format	O
10.5	O
AVI	O
10.5	O
BMP	B-Device
10.5	O
COLLADA	O
's	O
DAE	O
10.6	O
Cinema	B-Device
4D	I-Device
's	O
.c4d	O
Displays	O
the	O
2D	O
Preview	O
Image	O
embedded	O
in	O
the	O
file	O
.	O
</s>
<s>
GIF	O
10.5	O
Did	O
not	O
animate	O
animated	O
GIFS	O
without	O
additional	O
plugins	B-Application
until	O
OS	O
X	O
10.7	O
.	O
</s>
<s>
HTML	B-Language
10.5	O
Does	O
not	O
load	O
remote	O
resources	O
or	O
execute	O
scripts	O
.	O
</s>
<s>
iChat	B-Protocol
transcripts	O
10.5	O
JPEG	O
10.5	O
JPEG	O
2000	O
10.5	O
Microsoft	B-Application
Excel	I-Application
10.5	O
Microsoft	B-Application
PowerPoint	I-Application
10.5	O
Microsoft	B-Application
Word	I-Application
10.5	O
MIDI	O
10.5	O
MIDI	O
files	O
support	O
has	O
been	O
dropped	O
in	O
OS	O
X	O
10.8	O
.	O
</s>
<s>
MP3	B-Application
10.5	O
Cover	O
art	O
in	O
icon	O
view	O
and	O
can	O
play	O
back	O
audio	O
in	O
full	O
preview	O
.	O
</s>
<s>
MPEG4	B-Algorithm
10.5	O
MPO	O
PDF	B-Application
10.5	O
PictureClipping	O
10.6	O
PICT	B-Language
10.5	O
PNG	O
10.5	O
QuickTime	B-Application
movies	O
10.5	O
Additional	O
stream	O
formats	O
require	O
the	O
appropriate	O
QuickTime	B-Application
extension	O
to	O
be	O
installed	O
.	O
</s>
<s>
Plug-ins	B-Application
can	O
be	O
added	O
to	O
Quick	B-Operating_System
Look	I-Operating_System
to	O
allow	O
previewing	O
the	O
content	O
of	O
other	O
file	O
formats	O
.	O
</s>
<s>
Plug-ins	B-Application
can	O
also	O
be	O
used	O
to	O
add	O
additional	O
functionality	O
to	O
Quick	B-Operating_System
Look	I-Operating_System
such	O
as	O
syntax	O
highlighting	O
for	O
source	O
code	O
files	O
.	O
</s>
<s>
To	O
add	O
a	O
plug-in	B-Application
to	O
Quick	B-Operating_System
Look	I-Operating_System
it	O
needs	O
to	O
be	O
placed	O
in	O
the	O
folder	O
/Library/QuickLook/	O
.	O
</s>
<s>
There	O
are	O
multiple	O
ways	O
to	O
invoke	O
Quick	B-Operating_System
Look	I-Operating_System
.	O
</s>
<s>
Command	B-Application
line	I-Application
:	O
</s>
<s>
File	O
—	O
Quick	B-Operating_System
Look	I-Operating_System
file	O
name	O
;	O
</s>
<s>
Context	O
menu	O
(	O
right-click	O
or	O
-mouse	O
click	O
)	O
,	O
then	O
Quick	B-Operating_System
Look	I-Operating_System
file	O
name	O
.	O
</s>
<s>
Quick	B-Operating_System
Look	I-Operating_System
can	O
be	O
exploited	O
when	O
conducting	O
a	O
forensic	O
examination	O
of	O
a	O
computer	O
's	O
contents	O
.	O
</s>
<s>
A	O
thumbnail	O
cache	O
is	O
created	O
for	O
each	O
user	O
in	O
a	O
random	O
subfolder	O
of	O
/var/folders	O
called	O
com.apple.QuickLook.thumbnailcache	O
.	O
</s>
<s>
index.sqlite	O
which	O
is	O
a	O
SQLite	B-Language
database	O
containing	O
two	O
tables	O
-	O
files	O
and	O
thumbnails	O
.	O
</s>
<s>
thumbnails.data	O
contains	O
the	O
raw	B-Application
bitmaps	O
of	O
the	O
cached	O
thumbnails	O
.	O
</s>
<s>
Quick	B-Operating_System
Look	I-Operating_System
thumbnails	O
are	O
stored	O
for	O
documents	O
on	O
internal	O
disks	O
and	O
also	O
for	O
documents	O
located	O
on	O
removable	O
disks	O
,	O
including	O
those	O
that	O
have	O
been	O
encrypted	O
and	O
can	O
pose	O
a	O
significant	O
security	O
hole	O
.	O
</s>
