Mac reinstall os without disc

First, make sure you have all your files backed up. You can do this using the built-in Time Machine or another backup solution. While you can reinstall macOS and keep your personal data, backing up is still a smart idea. Here's how to easily create one. Next, you should sign out of Apple services like iCloud, iTunes, and iMessage. If you simply want to reinstall macOS without losing any data to fix issues or get a clean start , select Reinstall macOS from the list.

Select your disk on the left side of the utility, then use the Erase tab to wipe it clean. Finally, you can walk through the steps in the Reinstall macOS option. After some time, the reinstall process will complete.

Preparations you Need to Make Before You Reinstall macOS

Thankfully, Apple makes it easy to reinstall macOS, so the bulk of the time is just waiting for the process to complete. What are the signs that let you know when to get a new Mac? Here's when you should replace your Mac.

4 Reasons Why You Might Want to Reinstall macOS

Your email address will not be published. Starting on an Apple ][e in , I have been using Macs since the mac classic. A fresh OS install does usually speed up your machine. I reinstall every time my machine starts acting laggy, or crashes. I have an SSD, so there really should not be any lag, but my Macbook's still get issues every few months I am about to reinstall this evening since my Macbook has really been acting noticeably slow over the past few weeks.

I also support a Mac farm at work, for developer use. The Mac's 2 servers, and 4 mini's each need to be rebooted approximately once every month or two, as they really act weird: display errors, graphical glitch issues, and generally high latency. I reinstall each f those machines OS's approximately every 6 months, as the developers notice the difference in accessibility which compounds over time. Nice to see a post based in reality. Macs are great but they are not the flawless machines they are made out to be.

Macs need anti-virus, Mac OS software crashes, Macs needs to have their OS reinstalled for many reasons as discussed above. The Mac universe in general would benefit so much if there was way more reality and less completely false "It just works. That's going to be the simplest approach, otherwise you could try cloning your drive or restoring from Time Machine.

Restore Mac to Factory Settings Without Disc - MacBook Pro, Air, iMac, Retina Display, Mini

Thank you. I did clone the drive before the operation. But since that swap,the macbook is lagging, getting hot and doing some funny stuff. I did reset the SMC but still it was not operating as good as before the swap. So yesterday, I did re-install the OSX. Hopefully it will solve these issues. I was having issues at start-up Diagnostics determined no errors.

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All my programs and files remained, even my virtual drive. Literally everything that is an application or info that resides in an application remained untouched. What kind of a re-install is that?

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I am up and running as normal, and perhaps? Really an excellent contribution, Justin. This is the kind of real-world-decision-making help I didn't find on the Apple Support site. I'm bookmarking your site and looking forward to discovering more practical utility information of this type. We may come to think of our Mac as "running slow"; but, maybe that is just a perception rather than a truth.

Is there any software out there that can test the theory? For example, is there software that can detect when processes take too long? I recognize that "too long" can be a complex perspective; however, you get the idea. I can't think of any benchmarks that check whether your computer is being slowed down by software issues, it's really more of a subjective thing. It might be a good idea, though.

This weekend I backed up and wiped my hard drive. I had some games on my mac and a few passive apps e. My mac pro got so buggy for some reason time machine wasn't working out I bought a third party external hard drive 1 TB, which worked fine before and disk cleanup was pointless.

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Now my mac is running faster, way less lag, and fewer error messages. I don't remember the exact path. In its current state, it frequently reaches a point where it doesn't want to boot normally. What consistently restores the system to booting normally is booting to recovery mode and using Disk Utility to run a permissions repair on the Macintosh HD boot volume.

After running the repair and restarting, the Mac boots normally.

Before we begin

Do you think it's worth trying these for a more permanent solution? Or is this to be expected with Yosemite even for clean installs and I should keep doing what I'm doing and wait on a patch The system is running well otherwise, and with all the installed applications, I dread the thought of doing a clean install, particularly if it doesn't resolve the problem. I'd give the above tools a try first, then do a reinstall if the problem persists. I'm pretty sure the reinstall will solve the problem, but that's just my guess.

What about just cleaning your mac to speed things up? I would be very hesitant to use Yasu or Onyx or any mac cleaning software. I once used Mac Cleaner, and it got rid of Windows system files I needed. I use Paralells and Windows 8 on my mac to run Windows software, and after I used Mac Cleaner once, Windows 8 was essentially made useless. What other way is there to clean your mac? It there anything like cleaning your registry, like with windows? When they stopped supporting XP, got rid of Outlook Express, and generally stopped being backwards compatible, I said enuff is enuff and switched to Apple.

There is no "registry" on your Mac, and believe me: that's a good thing. Use the Rebuild Launch Service Database task to resolve these issues. Try it for free and see the difference a clean Mac can make. Grab it now and get cleaning. How To. Blog How To News. Hit Return or Enter to search. Igor Degtiarenko. Writer and blogger at MacPaw, curious just about everything.