As I've said before, slowing down is not an option 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.
If OS X El Capitan came preinstalled on your new Mac, you’ll probably never need this article until you decide to sell it. At that time, it’s a good idea to erase the disk and install a fresh copy of OS X for the next owner. If you’re thinking about reinstalling because something has gone. After reinstalling macOS in Internet Recovery Mode, use the Mac App Store’s Updates tab to upgrade your operating system to the most recent macOS version available. Some older Macs with OS X Snow Leopard may be able to use Internet Recovery Mode after installing OS X.
Jan 15, 2019 So if you’re looking to give your Mac a fresh start with just a classic Mac OS X and nothing else, to clean install Mac OS from USB is the best option for you. To clean install Mac OS from USB, there are three things you should do. First, you should clean up your Mac from the old baggage — system files that have piled up over time. Jul 08, 2019 Choose Reinstall macOS (or Reinstall OS X) from the Utilities window. Click Continue, then follow the onscreen instructions to choose your disk and begin installation. If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
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. Best of all, this will work with Lion, Mountain Lion, Mavericks, Yosemite, and El Capitan.
Active4 years, 6 months ago
I have been facing an issue regarding a OS X Lion installation in my Macbook Pro 13. I used to have OS X Lion, then I decided to update my O.S to the OS X Mavericks; the update was pretty good, it was successful.
The problem was when I tried to 'format' my Mac, during the re-installation of the O.S, a message appeared in my screen saying that the 'Recovery partition could not be created', that was weird for me, I am not very good with my Mac yet, so I tried using a OS X Lion installer (which is in a CD), I tried to install from the CD (what many people call a 'clean installation') but I got the same result regarding the 'partition recovery'.
I saw that some of the people mention that it is needed to delete all the partitions created, but in my case, every time I try to delete any of the partitions, it says 'cannot unmount disk', and I am not able to perform any deletion over the partitions as mentioned in many tutorials.
So far, I noticed that a yellow alert appears in one of the partitions before pick a drive for the installation:
Additionally, this is what I have when I open disk utility:
I tried deleting the partitions using the disk utility and even using the Terminal commands (with sudo) but I always get the same error: The disk cannot be unmounted.Please if somebody could help me, I will really appreciate, I've been without my Mac for more than 3 weeks. Thanks in advance.
Marcelo TatajeMarcelo Tataje
Macbook Won't Reinstall Os X El Capitan
3 Answers
When you're booted from the CD and looking at Disk Utility, you need to use the Erase tab, not the Partition tab. The EFI and Recovery partitions are hidden from view, so even if you delete all the partitions on the disk, it still won't delete that one.
If that still doesn't work, then you can open up a terminal window, and issue the following command:
That will zero out your entire hard drive, including all your partition tables. But it could take 2-3 hours depending how fast your hard drive is. Once it's done, you can create a new partition and install the OS.
If course, if you're really pedantic like me, you'd remove all media from the optical drive and USB ports, zero the hard drive, power off, zap the PRAM, reset the SMC, and then boot from Internet Recovery to do the OS install. That's factory fresh right there, my friend. The only thing it won't have after all that is the new computer smell.
It sounds like you are trying to rollback from Mavericks to Lion.
Your reasons are yours but the 'Recovery partition could not be created' should not be the one.
If that is your problem then reinstall Mavericks using the cmd-r during start up, it is Mavericks that creates the Recovery partition on your hard drive. That partition is hidden partition.
If you want to do it your self (or it does not work) then follow those instruction (or other sources) how to install recovery partition.
If you still want to roll back see instructions here @ apple.stackexchange (or other sources).
Go to a friend using a similar mac. Use a usb data converter to connect your hard drive. and clone this drive of yours with his. Of course all the materials in his drive will become yours. You need to erase them.Then you .You are experienced now. All the best Firts prepare the tools for your next formatting !