On an OS
X/macOS system, you may be able to determine a file's origin, i.e.,
where it was downloaded from, by right-clicking on the file, or clicking on it
to highlight it and then hitting command-I (the command and "I" keys), in the
Finder and choosing Get Info. If a "where from" field is displayed,
you can see the
URL from which the file was obtained if it was downloaded
from a website. You can also view that information from a
command-line interface (CLI), e.g.,
Terminal window, using the
If you would like to be put a system's name in your web browser, e.g., ajax,
into your browser's address bar and have the system automatically
append a domain name, e.g. example.com, so that the browser attempts
to access ajax.example.com, even though you just typed ajax, you
can modify the Domain Name System (DNS) search domain settings.
To do so on an Apple OS X/macOS system, take the following steps:
Click on the Apple icon at the top, left-hand side of your screen.
Choose System Preferences then Network.
Select the relevant network service, such as Wi-Fi or Ethernet, then click on the Advanced button.
Click on DNS.
Click in the Search Domains box and then click on the "+" at the bottom of that box to add a new search domain.
Type the name of the search domain, e.g. example.com.
Click on OK
You can add multiple domains; domains will be searched in the order you list them with the search starting at the topmost entry and continuing down through the list of domains with the search stopping when a valid name is found.
Advantages to using a text-based browser such as Lynx, in addition to it
not requiring a GUI, making it suitable to be run in a
Terminal window, is that it doesn't support
Flash, which makes it invulnerable to
vulnerabilities in Flash. Also, because it doesn't support
aka web beacons, which can track your web browsing activities via small
graphics files that will be invisible to you on a webpage, from being used to
track your browsing activities. It does support
cookies, though, which are also used by sites to track visitors, but Lynx
will prompt you if you want to allow cookies for a site when you visit the site
whitelisting and blacklisting capabilities. E.g., when a site tries to
place a cookie on your system, Lynx will prompt you as to whether it
should be allowed. You can choose from "Y/N/Always/neVer."
If you wish to determine the version of Firefox installed on an OS X
from a command line interface (CLI), you can open a Terminal window and
use the command shown below:
$ /Applications/Firefox.app/Contents/MacOS/firefox -v
Mozilla Firefox 45.8.0
You can also find the information in the
Info.plist file found at
/Applications/Firefox.app/Contents/Info.plist. The version number
will be on the line following the "key" line for CFBundleGetInfoString
and also after the "key" line for CFBundleShortVersionString
(version 45.8.0) became unresponsive on my
running OS X El Capitan (10.11.6). I killed Firefox by clicking on
the Apple icon at the top, left-hand corner of the page and selecting Force
Quit and then selecting Firefox in the list of running applications and
then clicking on the Force Quit button.
I then restarted Firefox by clicking on its icon in the
The icon bounced a few times and then stopped, so I assumed Firefox was now
running. But when I tried accessing it by holding down the command
while repeatedely tapping the tab key to cycle through the open
applications, it didn't appear. Nor did it show up in the list of running
processes shown by the Activity
command can be used on a Mac
system to determine some
machine dependent (machdep) features, such as
Central Processor Unit (CPU) features. E.g., the output of sysctl
machdep.cpu run on a
(Retina, 15-inch, Mid 2015) system with an Intel Core i7 processor is
Firefox stopped responding whenever I attempted to access a site. I could
verify network connectivity to various sites with
ping, but if I attempted
to access a URL in the Firefox browser on my MacBook Pro running
El Capitan, Firefox (version 45.7.0) would not display any webpage. I've had
this problem in the past; when it occurred, I would quit Firefox, sometimes
using Force Quit Applications, which is available by clicking on the
Apple icon at the top, left-hand corner of the screen and then selecting
Force Quit and then selecting Firefox from the Force Quit
Applications list of running applications and then clicking on the
Force Quit button. When I did that today, I saw the message below
Do you want to force "Firefox" to quit?
You will lose any unsaved changes.
I clicked on Force Quit, but that seemed to have no effect. I
closed and reopened Force Quit Applications and went through the
same process numerous times, but no matter how many times I repeated the
process, Firefox remained in the list of running applications that it
Homebrew is a
free and open-source (FOSS)
package management system that is available for
systems. Homebrew makes extensive use of
expand the support of several packages through user contributions. The
software was written by Max Howell in 2009; as of July 2016 there was a
team of twelve developers maintaining the software.
You can install it by opening a
Terminal window and issuing the command /usr/bin/ruby -e
"$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)". I recommend putting the
at the beginning of the command, so you won't be prompted so many times to
provide the password for your account during the installation, i.e.,
sudo /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)".
I usually have the OS X
set to display folders and files in alphabetical
order by setting the view mode to arrange the display of files and folder by
name. But sometimes I switch to view by size, etc. However, when I then switch
back to view the files and folders in column mode arranged by name, Finder
doesn't actually display them in alphabetical order, which is annoying.