OS X is version 10 of the Apple Macintosh operating system. OS X was described by Apple as its first 'complete revision' of the OS since the previous version is OS 9, with a focus on modularity so that future changes would be easier to incorporate. OS X incorporates support for UNIX -based applications as well as for those written just for. Android File Transfer. Browse and transfer files between your Mac computer and your Android device. Download now. For Mac OS X only. No extra software is needed for Windows. Search for System Information in Lion or later (or System Profiler in Snow Leopard and earlier versions of Mac OS) in Spotlight (press ⌘ and Space). The program is in /Applications/Utilities and is the tool to see the connected USB devices and other hardware details. It is quite simliar to Device Manager on Windows. How to Find a Disk ID & Device Node Identifier in Mac OS X Command Line Aug 9, 2016 - 6 Comments If you need to find the disk ID or disk node identifier (like /dev/disk0s2) of a volume attached to a Mac for one reason or another, perhaps the easiest way to obtain this information from the command line is with the diskutil utility. Mac OS X is Apple's operating system for its line of Macintosh computers. Its interface, known as Aqua, is built on a Unix foundation. Although it has much of the look and feel of the former Mac OS, features such as preemptive multitasking, symmetric multiprocessing, multithreading, and protected memory give Mac OS X improved stability and performance.
By default, your Mac starts up from its built-in hard disk, but a startup disk can be any storage device that contains an operating system compatible with your Mac. For example, if you install macOS on an internal or external drive, your Mac can recognize that drive as a startup disk. You can then follow the steps in this article to start up from it.
Use Startup Disk preferences
When you use Startup Disk preferences to select a startup disk, your Mac starts up from that disk until you choose a different one.
- Choose Apple () menu > System Preferences, then click Startup Disk.
- Click and enter your administrator password.
- Select your startup disk, then restart your Mac.
If you see a message that your security settings do not allow this Mac to use an external startup disk, check the External Boot setting in Startup Security Utility.
Use Startup Manager
When you use Startup Manager to select a startup disk, your Mac starts up from that disk once, then returns to using the disk selected in Startup Disk preferences.
- Press and hold the Option key immediately after turning on or restarting your Mac.
- Release the Option key when you see the Startup Manager window.
If your Mac is protected by a firmware password, you can release the key when you're asked to enter the password. - Select your startup disk, then click the arrow under its icon, or press Return.
If you press and hold the Control key during this step, your selection is saved in Startup Disk preferences, so it persists until you change it.
If your Mac is using OS X Lion 10.7.3 or later, you can also use this method to start up from your Time Machine backup disk. Startup Manager identifies your Time Machine backup as ”EFI Boot.”
If you can't select your startup disk or start up from it
Check for these possibilities if you can't see your disk in Startup Disk preferences or Startup Manager, or your Mac won't start up from it.
Check for a valid operating system on the startup disk
Make sure that your startup disk is using a version of macOS that's compatible with your Mac. You might need to reinstall macOS on that disk.
Check startup security settings
If you're using a Mac that has the Apple T2 Security Chip, check the settings in Startup Security Utility. These settings determine whether your Mac can start up from another disk.
Check for Option ROM firmware
If you're in Startup Manager and can't see your startup disk, press Option-Shift-Command-Period. If that works, do this each time you want to start up from the device or from a startup disk connected to it.
To enhance system security, Mac computers with up-to-date software don’t show devices that have Option ROM firmware until you press these keys in Startup Manager to load the firmware. On Mac models from early 2015 or earlier, you can disable this security feature to load Option ROM firmware automatically. This removes an important protection against potential unauthorized access to your Mac by other people with physical access to it.
- Open the Terminal app, which is in the Utilities folder of your Applications folder.
- Type
sudo nvram enable-legacy-orom-behavior=1
, then press Return.
To undo this command, entersudo nvram -d enable-legacy-orom-behavior
.
If you're using a firmware password on your Mac, the ability to load Option ROM firmware automatically or manually is disabled as an additional security protection. If you want to remove this additional protection but keep your firmware password:
- Open the Terminal app, which is in the Utilities folder of your Applications folder.
- Type this command, then press Return:
sudo firmwarepasswd -setmode command -allow-oroms
To undo this command, entersudo firmwarepasswd -setmode command
. - Type the administrator password for your user account, then press Return.
- Type your firmware password, then press Return.
- Restart your Mac.
OS X El Capitan, released during the Summer of 2015 and was available from the Mac App Store as a free download. Like previous versions of OS X, El Capitan has the annoying habit of automatically starting the installation process once the download is complete.
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This would be fine if all you wanted to do was quickly install El Capitan as an upgrade install over your existing version of OS X. But even if this is your goal, it's not too likely that you're actually ready to start the install process. After all, there's quite a bit of housekeeping to be done before you commit to installing OS X El Capitan: that includes having a recent backup of your data and making a bootable OS X El Capitan installer on a USB flash drive.
Having a bootable installer for OS X El Capitan is a good idea, even if your plan is just to perform an upgrade install, which technically doesn’t need to be done from a separate boot device. But having your own copy of El Capitan on a separate device ensures that you'll always be able to install or reinstall it, or perform basic Mac troubleshooting tasks, even if you have no connection to the Internet or access to the Mac App Store, should you need to re-download El Capitan.
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Create a Bootable OS X El Capitan Installer on a USB Flash Drive
![Mac Mac](/uploads/1/2/5/3/125373899/839518834.jpg)
There are two methods of creating the bootable installer; one involves using Disk Utility, the Finder, hidden files, and a great deal of effort and time. If you wish to use this method, you can follow our guide on how to make a bootable copy USB flash drive of the OS X Yosemite Installer, and no, that's not a typo. The older process outlined in the Yosemite document will work for El Capitan; you need only be aware of file name changes, such as El Capitan instead of Yosemite in the instructions.
There's also a second method, and it's the method we prefer because it's less involved, has fewer places where things can go wrong, and only involves using a single app: Terminal.
What You Need
First, you'll need a copy of the OS X El Capitan installer. Originally, this guide was written to include instructions for the public beta of El Capitan that was released during the summer of 2015. Since the official release of El Capitan, this guide has been updated to work with the official release and no longer references any of the beta versions of the OS.
Next, download the installer from the Mac App Store. Once the download is complete, the installer will start automatically. When it does, be sure to quit the installer. If you allow the installer to actually perform an installation, the installer will delete itself at the end of the process. We need the installer program to help us create a bootable installer, so don’t let the installer run.
If you have already installed OS X El Capitan, and wish to now create a bootable installer, you can force the Mac App Store to re-download the installer.
- The El Capitan installer is downloaded to the /Applications folder, with the file name Install OS X El Capitan.
- A 16 GB or larger USB flash drive. These instructions will also work for other suitable bootable devices. I’m going to assume that you're using a USB flash drive, but any bootable device will work, including an external drive or internal drive.
- A Mac that meets the OS X El Capitan minimum requirements.
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Use Terminal to Create a Bootable OS X El Capitan Installer
The process of creating the bootable OS X El Capitan installer causes the USB flash drive you're using as the destination for the installer to be erased. So, before you proceed, make sure you either have a backup of the flash drive's contents (if any) or that you don’t care that they'll be erased.
The Secret createinstallmedia Command
It's not much of a secret, especially since we have used this method in the past to create bootable installers for previous versions of OS X. But since it involves using Terminal, and entering a long command with quite a few arguments that need to be provided, it remains mostly unused, if not completely ignored, by many day-to-day Mac users. Still, it's the easiest way to create the bootable installer, so let's get started.
2GB of RAM/main memory. PC must have a broadband connection to access games, play store accounts!Minimum Disk Space:. Trainz driver 2 apk.
Mac Os X Device Samsung
You need the OS X El Capitan installer you downloaded from the Mac App Store; make sure it's present in the /Applications folder. If it isn't, flip back to Page 1 of this guide for details about re-downloading the app from the store.
Create the OS X El Capitan Bootable USB Installer
Mac Os X Device Not Configured
- Connect the USB flash drive to your Mac.
- Give the flash drive an appropriate name. You can do this by double-clicking the device’s name on the desktop and then type in a new name. We suggest calling the drive elcapitaninstaller. You can use any name you wish, but it shouldn't have any spaces or special characters. If you do select a different name, you'll need to modify the Terminal command we outline below with the flash drive name you selected.
- Launch Terminal, located in /Applications/Utilities.
- Warning: The following command will completely erase the flash drive named elcapitaninstaller.
- In the Terminal window that opens, enter the following command. The command is a single line of text, though your web browser may show it displayed over several lines. If you used the drive name suggested above, you can triple-click on one of the words in the command to select the entire line of text.
- Copy (command+C keys) the command, and then paste it (command+V keys) into Terminal. Press return or enter.
- You'll be asked to provide an administrator password. Enter the password, and press return or enter.
- The terminal will execute the createinstallmedia command and display the status as the process unfolds. Erasing and copying the files from the OS X El Capitan installer can take a bit of time, depending on how fast the USB flash drive is. You may want to consider taking a break and stretching your legs.
- Once Terminal completes the command, it will display the line Done, and then show the Terminal prompt waiting for a new command to be entered.
- You can now quit Terminal.
The bootable OS X El Capitan installer has been created. You can use this bootable installer to perform any of the supported installation types, including an upgrade install or a clean install. You can also use it as a bootable troubleshooting tool that includes an assortment of apps, including Disk Utility and Terminal.
Mac Os X Devices Remote Disc
If you would like to create a bootable installer of other versions of the Mac OS you can find instructions in our guide: How to Make a Bootable Flash Installer of OS X or macOS.