First, reclaim disk space by removing unwanted, troublesome files and two, perform routine maintenance to keep your Mac in tip-top shape. For most people this works just fine, and is the recommended method. Those who still wish for a clean install must recognize that this means everything will be erased from their hard drive:.
Double-click on Disk Utility and a menu will pop up. Step 5Wipe Your Hard Drive. Then proceed to highlight your computer's hard drive; select the Erase tab. Do you take out the hard drive or SSD and smash it? Do you How to Wipe a Mac Hard Disk Drive (HDD) Without it, that data is encrypted.
With that done, you certainly can perform a clean install of OS X. Set aside a Saturday that you can devote to the task.
We, however, recommend less drastic measures. Forget risky reinstallation and see the difference a cleaner Mac can make.
Mail attachments - When you open or view a new attachment in Mail, the application stores a copy on your disk and keeps it until you delete the associated email. After a while, the total volume of copied files may reach a couple of gigabytes or more. Clean the local copy while keeping the original on your email server intact. CleanMyMac locates and deletes these files safely and easily. Last but not least is the Trash bin.
Quickly run essential scripts and procedures that will keep your Mac in great shape for a long time, and prevent lag under high workloads. Then you may proceed.
Click on Disk Utility then Continue first of all to get your Mac's hard drive wiped. Select Erase and then confirm your choice. Follow the instructions that appear on screen, license agreements and all, and choose the hard drive to use in most cases it'll be the only one available.
Along the way you can sign in with your Apple credentials to get your apps and iCloud links back again. You're going to be looking at about an hour's worth of reinstalling time but after that you're good to go and ready to enjoy your good-as-new Mac OS X experience. You might find that some of those apps and shortcuts you had installed weren't actually that useful after all.
Open adampash. The A. This only works for Lion and higher. If my computer originally came with Snow Leopard but has since been upgraded to Mavericks, will I be able to do the factory reset back to Mavericks? Or will it revert all the way back to Snow Leopard, requiring the discs? Yes, it should work just fine. Lion through El Capitan has the Recovery built-in, and it will reinstall OS X using whatever current version you are on.
If not, you might need to download the firmware to use the Internet Recovery version, but this installs whatever was originally on the computer, so you'd have to update your OS again from the Mac App Store. Everything works fine up until the last step after entering my ID and Password Try again later.
My hard drive crashed on my Imac took it to computer repair they installed new hard drive, tried to recover data but could not, when we presented the imac to the apple store they told me i would have to buy back my old hd from them um hello no way, so thats why we went to another place that works on macs, so apple said i had lion on the mac, i couldnt remeber but now i remember i had leopard, the computer place installed lion, well now I cannot get any of my programs installed from the dics i have, like my photo software, etc, any cd i put in stays in for a minute then pops back out.
I turn on the computer, hold the command and r keys for 15 sec. Oh the joy of reading Service currently not available when it tries to download Mavericks online and all the while having only windows computer working. My late Mac Pro would not boot this AM. Would not let me reinstall OS X. Would any think it is more than a bad internal drive 1? I pulled the drive 1 out, checked all the pins and reinstalled into its slot firmly. It goes to grey screen and first tone There is not the "Reinstall the OS X" in my computer.
Why not? Now what can I do? Please help me. I really need my computer for work. 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. If I am currently running a public beta of El Capitan, will this method still work and install the official release of El Capitan?
There's a good chance that it will re-install the public beta version, since it was the most recent OS installed on your Mac. Apple suggests installing from the Mac App Store instead. Now I need to format the new HD.