On Intel-based Mac computers, the framework supports machines with an Intel VT-x feature set that includes Extended Page Tables (EPT) and Unrestricted Mode. At runtime, determine whether the Hypervisor APIs are available on a particular machine with. I found an awesome hack for Terminal in OS X. Its called Visor, its a quake style terminal for OS X. Terminal is your friend, never forget that. It took me a relatively short period of time to figure that out. I really enjoy using Visor since it makes terminal easily accessible – and it looks darn cool too! How to Install Terminal Hack Visor.

Visor Editor's Review

Visor is a free download, Mac OS X only, not to mention a must-have for the die-hard Terminal junkie. Alternately, check out Terminal replacement, iTerm.
Requires Mac OS X 10.9 or above; Not an editor #6 VSD Viewer Online Online. This online viewer is designed only for the VSD format, so you can only use it to open Visio drawings. If you try to add an OPC/XML drawing, it will refuse to upload.
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Visor is a SIMBL plugin for the Terminal application.
Visor adds a new menu item in the 'Terminal' menu, right under 'Preferences'. This new preference pane allows you to set a quick access HotKey for the shell emulator.
Visor has just a few preferences like: the HotKey, the possibility to use a custom background for the Terminal, the possibility to use a Quartz Animation, and some settings about the transitions. You can also enable/disable a status menu item for Visor.
The access to the Terminal is very easy by using Visor. Once you managed to install and configure it all you need to do is to hold the HotKey or the HotKey combination, and the terminal opens into a sliding window. Please note that SIMBL is a requirement and you have to install SIMBL first.
Pluses: it enables a quick access shell.
Drawbacks / flaws:
In conclusion: this is a pretty good improvement for the built in Terminal application. It's very useful if you use often the shell for various activities.
version reviewed: 1.2.1

Visor retired

Visor has a new home and it is called TotalTerminal now.

Don't worry it is still open-source and I will continue to support TotalTerminal in the future.

Installation

Install SIMBL and make sure you have latest SIMBL 0.9.x
Place Visor.bundle into ~/Library/Application Support/SIMBL/Plugins (create this directory if it does not already exist)
Relaunch Terminal.app - You should now see the Visor Status Menu Item
Configure your keyboard trigger by selecting the Visor Status Menu Item ->Visor Preferences ... and edit your keyboard hot-key

You can now trigger Visor with your hot-key from any application to get an instant terminal session.

To hide Visor, you can either:

re-trigger with your key-combo
optionally, you can click off the Visor window

Visor For Mac Os X 10.8

Compatibility

Visor 2.2 is tested to work with
- SIMBL 0.9.x on Snow Leopard (both 32-bit and 64-bit)
- SIMBL 0.8.x on Leopard (32-bit)
Visor 2.1 is tested to work with
- SIMBL 0.9.x on Snow Leopard (both 32-bit and 64-bit)
- SIMBL 0.8.x on Leopard (32-bit)
Visor 2.0 is tested to work with
- SIMBL 0.8.x on Snow Leopard but Terminal.app has to be forced to run in 32-bit mode
- SIMBL 0.8.x on Leopard
Visor 1.9 is tested to work with
- SIMBL 0.8.x on Leopard

Source

Installation from source

Prerequisities:

ruby + rubygems
XCode 3.2+
zip/unzip

Custom installation steps:

Feel free to fork and contribute.

Source code licensed under Apache License 2.0

FAQ

I like the idea, but I want to use Terminal.app features. Do you plan to support tabs/unicode/whatever?

Visor is just a light-weight plugin for Terminal.app (SIMBL). You should be able to use most of Terminal.app features with Visor. The only broken feature is 'Windows Groups'.

Does Visor work on OSX 10.6 (Snow Leopard)?

64-bit Terminal.app in Snow Leopard is supported by Visor 2.1 and later.

Does Visor work on OSX 10.5 (Leopard)?

Leopard is supported by Visor 1.5 and later, the best version is Visor 2.1.

Does Visor work on OSX 10.4 (Tiger)?

Tiger was supported by early Visors (pre 1.5). It was in the days when I was a young Windows hacker. I will never look back, so your only chance is to upgrade to (Snow) Leopard.

How do I uninstall Visor?

Visor is a standard SIMBL plugin. Remove Visor.bundle from ~/Library/Application Support/SIMBL/Plugins:

Or alternatively you can run rake uninstall task if you have a cloned git repo.

Where are Visor settings stored?

Visor settings are stored with Terminal.app settings. You can open ~/Library/Preferences/com.apple.Terminal.plist and tweak the values (better to do this when Terminal.app is not running). If you have troubles with Visor settings or the generated Visor profile, delete this file and restart Terminal.app. The file will be recreated with default values.

My Visor menu-bar icon is dimmed out. My hot-key doesn't work and just beeps. What's wrong?

There can be only one visor-ed terminal window in the system. If you close this terminal window (for example Control+D or typing exit in shell), Visor gets into the disabled state you are describing. Just open a new terminal window and it gets visor-ed again. You can do this for example by clicking on Terminal.app icon in the Dock.

How can I open a new terminal window the old way, as a classic OSX window?

If there is a visor-ed terminal window (Visor menu-bar icon is active) every new terminal window will be opened as a classic OSX window. In other words, open at least two terminal windows. The second one will be classic terminal window for sure.

How can I change the height of Visor?

Go to Terminal.app's Preferences -> Window -> Rows

How can I stick Visor to left screen edge?

Look for the 'Position' option in Visor Preferences and pick 'Left-Stretch' window placement.

How can I change the width of Visor?

By default Visor window stretches to the full screen width. Set some non-stretching positioning for Visor window in Visor Preferences, then Go to Terminal.app's Preferences -> Window -> Columns.

Is it possible to show Visor only on a secondary monitor?

Go to Visor Preferences -> Screen

Is it possible to see Visor on every Space?

Visor 1.6 does not respect Spaces settings (Issue 52). Visor 1.7+ forces its window to be visible on every space. You may disable this in Visor Preferences. Note: Spaces configuration for Terminal.app doesn't apply to the visor-ed terminal window, it is effective only for other (classic) terminal windows.

I want to keep different preferences for Visor and other (classic) terminal windows. What is the best way manage this?

Well this was quite a pain point in older Visor releases. From Visor 2.0 there must be a profile in Terminal.app called 'Visor'. Visor-ed window always use the 'Visor' profile for opening new tabs (regardless of 'default profile' or 'startup profile' settings in Terminal.app). To make your life easier Visor creates this profile for you if it does not exist and fills in Darwin's preferred Visor settings (black background with fine colors, 90% opacity).