As I've said before, for me. At one point, I realized that there were plenty of files on my Mac that I didn't need any more, but too many to delete individually.
In other cases, your Mac can be experiencing some major malfunctions: constant crashing, locked controls, slow boot times, missing files, etc. Often, the best option to fix these problems would be to reformat your computer and reinstall your OS, but since most of us don't plan on ever taking this drastic measure, we don't obtain a recovery disc or thumb drive. Thankfully, the geniuses over at Apple have made the process easy for us—no need for a disc; no need for a drive—all you need is a decent internet connection. With just a few clicks of some buttons and your Mac is gonna be running like it did the day you got it.
In this article, you are going to learn that how to create bootable USB for Mac OS in case you don’t have Mac computer. If you don’t have Mac computer so don’t worry about it. Because we will show you how to create bootable USB Installer for Mac OSX on Windows 7, 8, and Windows 10.
Best of all, this will work with Lion,. Step 1: Back Up Your Files! Okay, so you may have a lot of files that you want to get rid of, but you definitely have some files you want to keep. In my case, I even have programs I want to keep so I don't have to re-download them after the process is over. Use a writable CD/DVD, a, or any of the multitude of cloud options to keep your important files backed up. You could also create a Time Machine backup, but I wouldn't do a full restore later—just pick and choose things you want back after a fresh install—otherwise it could run just as sluggishly or erratic as it did before.
Step 2: Restart Your Computer Once you've double-, triple-, and quadruple-checked your backups, restart your computer. Step 3: Press CMD+R The second you see a grey screen, hold the CMD and R keys down for about 15 seconds, then let go and you'll be taken to OS X Utilities recovery. PLEASE HELP!! Whenever I turn on my iMac, it would load up to the apple logo and shut down after a few seconds. This happened ever time i tried to turn it back on again. I had a bit of hope but nothing ever changed so I decided to erase my disk and was immediately promoted me to restart my computer.
When I did, it brought me a a symbol of a folder with a question mark which flashed forever. I held the power button to turn it off and hit it to turn it on again while pressing command and R keys at the same time, it brings me a sign of a spinning globe that loads forever. When I restart it and immediately insert its installation DVD while pressing key C, it brings me the apple logo and stays like that for ages.
This is freaking me out. I have read and tried so may solutions online but nothing has changed. Please help me with another way.
In summery, my computer has no files and I won't install a new OS. So I'm having a slightly different issue. I've followed your steps, but every time I hit 'erase,' it brings up a notice saying: 'Disk Erase failed with the error: Couldn't unmount disk.' I've attached a pic of the error.
However, on the left one can clearly see the main '500.11 GB Toshiba MK5,' and below it, the 'Macintosh HD' option. This error pops up ONLY when I try to erase the Toshiba drive. But it allowed me to erase the Macintosh HD option. Has my drive been erased nonetheless? Or do I still need to do something else?
Is all hope lost? FYI: was running Mountain Lion. My original install discs are probably lost for good.
![Mac Mac](/uploads/1/2/5/3/125391962/349637260.png)
Some very interesting changes in how Windows is installed in Boot Camp on OS X 10.11 “El Capitan”. When you open Boot Camp Assistant on a new Mac that supports Windows 8 or later, you’ll get the new Boot Camp interface.
Notice the ISO image and partitioning are all on a single screen. Prior to El Capitan, you had to insert a USB Flash Drive and Boot Camp Assistant copied the Windows installer from an ISO disk image to the flash drive, and then downloaded and set up the Windows drivers to the correct location in the installer for the Mac hardware. El Capitan makes this a lot simpler. Just select the ISO and how much space you want from Boot Camp, and then you click Install. After Boot Camp Assistantd completes, OS X restarts to the Windows installer, and you follow the normal Windows installation. Behind the Scenes So how is this possible? Where is the Windows installer if there is no installation media?
Boot Camp Assistant doesn’t just create a Boot Camp partition, but also creates an additional partition called “OSXRESERVED” that is FAT32 formatted. It places this partition right after the recovery partition, and before the Boot Camp partition, as shown below. The command line make this really clear. Partition 1 is the standard EFI partition, partition 2 is the Mac partition, partition 3 is the Recovery partition. All standard stuff. Partition 4 is now the OSXRESERVED partition, and partition 5 is the BOOTCAMP partition.
You’ll also notice that disk2 is the Windows install ISO disk image that the Windows install files are copied from. The OSXRESERVED partition has all the installer files, the Boot Camp drivers for Windows, and the EFI files for booting.
If you are familiar with EFI booting on OS X, you’ll see a familiar setup. The EFI folder on the OSXRESERVED partition is the same one you would normally find on the EFI partition (normally disk0s1). It appears that newer Macs have the ability to detect this partition and present it to Windows as if it were EFI installation media (such as a DVD or USB Flash drive). So what happens to this partition after you are done installing? During the next boot into OS X, the OSXRESERVED partition is removed and put back into the Core Storage container of the OS X partition: Note that the Device is disk0s5 since the other partition existed on startup, but then it was deleted. On next reboot, this device will change back to disk0s4, which is the standard device location for a Boot Camp partition.
This setup is not supported on all Macs that run El Capitan. Only hardware that has newer firmware supports this. We did a survey of all the shipping Macs, and here are the ones that support this new slicker setup: Supported:.
Mac Pro. MacBook Air 13‑inch. MacBook Air 11‑inch. MacBook Pro 13‑inch. MacBook Pro 15‑inch Older USB Installation. iMac 21.5″. iMac 27″.
MacBook Pro 13‑inch. USB-C MacBook (surprising) El Capitan’s Boot Camp-related updates are not just limited to Boot Camp Assistant. There are also changes in how Boot Camp is affected by the new System Integrity Protection (SIP). Tune in tomorrow for the next segment.
Do you have Windows running on your Mac in a Boot Camp partition? Check out and to backup, migrate, and manage your Boot Camp partition.
Find this article interesting? Let me know what you think by tweeting at me on Twitter.