mac下制作USB启动盘
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mac下制作USB启动盘?
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From Mac
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Note: this procedure requires an .img file that you will be required to create from the .iso file you download.?
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TIP: Drag and Drop a file from Finder to Terminal to "paste" the full path without typing and risking type errors.?
Download the desired file?
Open the Terminal (in /Applications/Utilities/ or query Terminal in Spotlight)?
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Convert the .iso file to .img using the convert option of hdiutil (e.g., hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/kubuntu.iso) Note: OS X tends to put the .dmg ending on the output file automatically.?
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Run diskutil list to get the current list of devices?
Insert your flash media?
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Run diskutil list again and determine the device node assigned to your flash media (e.g. /dev/disk2)?
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Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command; in the previous example, N would be 2)?
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Execute sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m (replace /path/to/downloaded.img with the path where the image file is located; for example, ./ubuntu.img or ./ubuntu.dmg). Using /dev/rdisk instead of /dev/disk may be faster. If you see the error dd: Invalid number `1m', you are using GNU dd. Use the same command but replace bs=1m with bs=1M. If you see the error ?dd: /dev/diskN: Resource busy ?make sure the disk is not in use. Start the "Disk Utility.app" and unmount (not eject) the drive.?
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Run diskutil eject /dev/diskN and remove your flash media when the command completes?
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Restart you Mac and press alt while the Mac is restarting to choose the USB-Stick
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快速几步：
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1.把iso转成dmg格式
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5. 弹出U盘
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diskutil eject /dev/diskN??
6. 重启时按住Option键，选择usb启动。
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