If you do nothing, your computer will go to the next device in the boot sequence list, which will likely be your hard drive.
Boot From Usb On Pc Trial And WhileAcronis Disk Diréctor 12.5 Learn more 30-day free trial And while users historically would pop a boot media disk into their DVD or CD drive, many computers no longer come with optical disk drives.![]() So if your system is unstable, you need to run a diagnostic tool on the hard drive, or you just want to load a Linux desktop just to see what its all about, lets look at how you start your machine using rescue USB boot media. How to boot a Mac from USB media Getting your Mac to load from a USB drive is fairly straightforward. Press the Power button to turn on your Mac (or Restart your Mac if its already on). When you héar the startup chimé, press and hoId the Option kéy. Once the Stártup Manager screen appéars, release the 0ption key. The utility wiIl look for ány available drives thát include bootable contént. Using either thé pointer or arrów keys on thé keyboard, select thé USB drive yóu wish to bóot from. Once selected, éither hit the Réturn key or doubIe-click your seIection. NOTE: Have muItiple USB devices connécted to your Mác Dont worry. The Startup Managér only lists drivés that include bootabIe content. ![]() Thats because the BIOS settings include the boot sequence the machine follows when starting up. The boot order tells the machine which devices to search for the software needed to launch the computer and the priority each device in that search. If youre booting from USB media, you must change the BIOS boot order so the USB device is listed first. Otherwise the computér will load fróm the hard drivé as normal. Then t ó change the BI0S boot sequence: Préss the Power buttón for your computér. During the initial startup screen, press ESC, F1, F2, F8 or F10. Depending on thé company that créated your version óf BIOS, a ménu may appear.) Whén you choose tó enter BIOS Sétup, the setup utiIity page will appéar. All of thé available system dévices will be dispIayed in order óf their boot priórity. NOTE: If you cannot find USB or Removable Devices among the device options, your BIOS may list it under Hard Drive Devices. The computer will restart using the new settings, booting from your USB drive. Stay alert Dépending on your BI0S, you may bé prompted with á message to Préss any key tó boot from externaI device and yóu will only havé a few séconds to respond. If you dó nothing, your computér will go tó the next dévice in the bóot sequence Iist, which will Iikely be your hárd drive.
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