the process of reinstalling OS X

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19
votes
9answers
43k views

This copy of the Install OS X El Capitan application can't be verified. It may have been corrupted or tampered with during downloading

Macbook Pro 13" 2015 with OS X Yosemite on board. I've been trying to install OS X El Capitan, but always get the following message: "This copy of the Install OS X El Capitan application can't be ...
17
votes
4answers
1k views

Pros and cons of wiping a new Mac?

Coming from the PC world, most made-to-order manufacturers (e.g., Dell, HP, Acer, etc.) all have annoying little addons which I consider spyware/bloatware--things like toolbars with ads. When buying ...
16
votes
5answers
11k views

What is the best way to generate a Yosemite or Mavericks Install USB flash drive? [duplicate]

I could probably copy the contents from the package, but what is the best way to create an install Flash Drive for Mavericks? Of course ideally the drive should be bootable.
12
votes
3answers
27k views

Reinstall Mac OS X Mountain Lion before selling a Mac

I want to sell my laptop (Macbook Pro late 2011). I have erased my disk drive but it seems that I cannot reinstall Mac OS without an Apple ID. At the origin my mac was shipped with Lion, I have ...
10
votes
7answers
30k views

How can I get back a system file after deleting it from my Mac?

I've deleted a system file from my Mac and need to get it back. System files can include: hidden files in the root of / - especially unix files in /private /System files /Library files /...
9
votes
2answers
690 views

Reinstalling Lion

My Mac has gotten pretty dirty from all the stuff I've installed and the files I have accumulated these past months. I have tried reinstalling by holding Command-R and following the process. However, ...
8
votes
4answers
50k views

Macbook keeps booting OSX Utilities instead of Mac OS X

Here is my story I had a MacBook PRO 2010 with Mac OS X 10.8 Mountain Lion since I bought it I've never reinstalled the OS until now. I did a clean install following this instructions http://www....
8
votes
2answers
55k views

Is restoring a Time Machine backup on a clean install of OS X Mavericks still a 'clean' install?

I would like to upgrade to OS X Mavericks. Also, I think it would be a good chance to clean up my system. My question is: If do a clean install of OS X Mavericks and then restore my machine from a ...
8
votes
1answer
3k views

How do I run this command in verbose output mode?

I want to update my OS X Mavericks USB key and would like to be able to see what my mac is doing after I enter the following command. sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/...
7
votes
3answers
27k views

Changing SSD's and keeping everything

I have a mid 2010 13" MBP. I have an SSD, its not big enough so I am upgrading from 128GB to 256GB. How can I take everything from the current SSD and then upload it to the new SSD - effectively ...
6
votes
3answers
35k views

How to do fresh install of Mountain Lion?

My Mac is very slow. My Mac is running OS X Mountain Lion after an upgrade from Lion. How can I do a fresh install the OSX Mountain Lion, with a clean HDD (all of my documents deleted), so it ...
6
votes
3answers
4k views

Can't download Mountain Lion from app store on a Mac already running Mountain Lion?

I am trying to download and/or acquire an operating system installer for my newly purchased Mac. My objective is to put this onto some form of removable media (USB ideally) such that in the event that ...
6
votes
5answers
191k views

How do I create a Mac bootable USB drive using Windows?

My MBA 2012 with OS X 10.9.4 Mavericks won't boot anymore - it simply freezes after the initial jingle. I already tried resetting NVRAM and SMC, but to no avail. I don't have any time machine backups. ...
6
votes
1answer
1k views

How to securely restore new MacBook air after someone else was first admin user

I've just received my new MacBook Air. (my first Apple computer in 15 years!) Unfortunately, I had it sent to work on a day I wasn't in, and it was mistaken for the new intern's computer. He proceeded ...
5
votes
2answers
2k views

Do I need to reinstall OS X after accidentally removing Python?

I managed to delete my python in usr/bin by foolishly doing sudo rm /usr/bin/python and now it seems like I need to reinstall my OS. First off is this necessary? And secondly is there an easy way to ...
5
votes
1answer
153 views

Configure Time Machine after reinstalling Mac OS to take previous backups into account

I have reinstalled my Mac OS (10.9) and had to specify again my external hard drive for backups in Time Machine preferences. Now i can enter Time Machine and see my previous backups. However, Time ...
5
votes
2answers
2k views

How do I do a clean install of Yosemite?

I'd like to start from scratch with Yosemite. I have Mavericks running on my iMac now but I'd like to just wipe the system and start with a clean Yosemite install. How do I do a clean install of ...
5
votes
0answers
29k views

How can I download Mavericks from Yosemite? [duplicate]

Does anyone know how to download Mavericks from Yosemite? I'm trying to get the image to put on a different computer but it won't let me download it from the App Store. I click "download" and it ...
5
votes
3answers
2k views

Is it possible to install flash firmware update without having access to OSX?

So I erased my HD and wanted to install Mac OSX Mavericks on my MacBook Air mid 2012 model and after I booted from the USB and was about to install Mavericks the damn thing tells me it can't do so ...
4
votes
2answers
4k views

How can I extract the Mountain Lion installer from the recovery partition

I just got a new macbook pro, and I want to swap out the internal hard disk with an SSD. My machine did not come with install media, so I was planning on trying to make some based on the recovery ...
3
votes
3answers
8k views

How to replace hard drive without reinstalling the whole system?

I recently purchased a 1TB solid state hard drive Samsung Electronics 840 EVO-Series 1TB 2.5-Inch SATA III Single Unit Version Internal Solid State Drive MZ-7TE1T0BW. I hope I won't need to manually ...
3
votes
2answers
1k views

Can iMac 5 (Retina 5k, 27-inch, Late 2014) be downgraded if it comes factory-installed with Yosemite?

Has anyone downgraded an iMac 5 (Retina 5k, 27-inch, Late 2014) pre-installed with Yosemite to an older version of Mac OS? My Pro Tools 10 does´t work with Yosemite. I have two days to resolve this, ...
3
votes
1answer
61k views

Where are my all installed programs?

I am new to Mac OS X and till the time I was using Windows 7/8. I tried to download and install programs in Mac OS X, but I do not see them in Launchpad. Where are all my programs are going. Secondly,...
3
votes
1answer
317 views

When can I remove the El Capitan install drive?

I have installed 10.11 from a USB drive, it has run as expected and I am now at the "Create account" screen (input name+username). I will now turn the computer over to the person who will do the ...
3
votes
1answer
2k views

Install a clean Mavericks and then use TimeMachine makes it unclean again?

I am about to install OSX Mavericks in an iMac I have. I would love to make a clean install (creating the bootable USB with that complex procedure). I was thinking about copying folder by folder but ...
3
votes
1answer
62k views

Can't start up MacBook Pro from OS X install discs

I wanted to re-install my mid-2010 15-inch MacBook Pro (Intel Core i7 2.66 gHz 8 GB 1067 MHz DDR3 RAM) which is currently running Mac OS X 10.6.8. I inserted the retail Mac OS X 10.6 install disc, ...
3
votes
1answer
11k views

Sold my MacBook Pro Lion, how to reset OS installation?

I just sold my MacBook Pro. It originally came with OS X 10.6.6 (snow leopard). I since upgraded it, through the App Store, to OS X 10.7.5 (lion). I want to wipe everything clean on the hard drive so ...
3
votes
1answer
260 views

How to remove OS X Installer for 10.10. to get back to 10.7, the originally installed OS?

I ran OS X 10.7 latest version on my MacBookPro 2011. Then I installed on an external USB stick 10.10.3 from my running system OS X 10.7. The installation on the stick was successful. After ...
3
votes
2answers
1k views

Is it easy to mount my Time Capsule after a clean install (without any restore) so that I can copy individual files from it?

People say it is possible but I am suspicious. I want to clean install and start fresh with nothing. Then I can access my Time Capsule that has my backup and copy any files I want. How easy or ...
3
votes
1answer
36 views

Transferring Files After a Clean Install

I am planning to do a clean install of Mountain Lion (on a Macbook Pro that was updated to Yosemite) after being told that I have some corruption in my hard drive. The computer (only 3 years old) has ...
3
votes
2answers
1k views

Old Mac OS X, cannot get admin access, boot safe or single-user mode, nor reinstall

I have inherited an old Mac OS X 10.5.8 + original install DVD. Model: Power Mac G4 Identifier: PowerMac3,6 Processor: PowerPC G4 (3.2) DVD: Mac OS X Leopard Install DVD Version 10.5 I'm trying to ...
3
votes
1answer
53 views

Can I use the same bootable drive for all models?

I currently have a Late 2010 MacBook Air and looking to get the new Air when it comes out later this year. My question is, I have just made a bootable USB installer (by using createinstallmedia ...
3
votes
1answer
58 views

How do you get the internal drive to show up when you're reinstalling?

Macbook Pro. Trying to reinstall Yosemite. I can get to the "Install OS X" page, but the only destination given is "Recovery HD". I can go to disk utilities and see that "Macintosh HD" is there, ...
3
votes
1answer
4k views

Clean install a Macbook without another Mac

A friend of mine recently bought a new laptop and passed me his old Macbook Pro 6,2. I think he had Lion on it, but the installation CD has been long lost. I put in a new disk (he kept the original ...
3
votes
2answers
5k views

Can't download Mavericks - I got a Mountain Lion CD, what to do?

This is the most silly question I'll ever ask, and I'm sorry for this. But doing the following: Step 1: https://itunes.apple.com/en/app/os-x-mavericks/id675248567 Step 2: http://www.apple.com/osx/...
3
votes
5answers
12k views

How to extract InstallESD.dmg from my iMac Recovery Partition?

I'm trying to extract the InstallESD.dmg image so that I can create a USB key any time I want to in the future, to recover/boot my 2011 iMac. I would think this would be no problem at all, since the ...
2
votes
1answer
1k views

Problem after erasing the HD of a brand new Mac (OS X Yosemite) with Disk Utility

I cannot reinstall OS X Yosemite now, as there's no hard drive I could see. I had erased the HD with the idea that it will create a new partition but it didn't, so now I can't see a hard disk on ...
2
votes
2answers
6k views

Is target disk mode a clean way to install (Mountain) Lion on a blank mac?

Since I don't have an optical disc, and no USB thumb drives are available, but I do have a second mac, target disk mode over FireWire seems like the only way to install Mountain Lion (since this 2010 ...
2
votes
1answer
65 views

Can I use a large external hard drive both as installation media and backup drive?

I am planning to upgrade my Mid 2010 13" Macbook Pro to Yosemite from Snow Leopard, on a new SSD hard drive. Being more experienced now with UNIX/Mac, I want to have a clean install to get rid of the ...
2
votes
2answers
274 views

Can I install OS X onto a separate external drive partition?

There are plenty of articles explaining how to install OS X on a separate partition of your Mac’s internal drive and how to install it onto an external drive using a single partition. However, it’s ...
2
votes
2answers
409 views

Cannot reinstall OSX Mac mini 6,1

I've been trying to install Ubuntu server on my Mac mini 6,1 with no success. However now I'm stuck and can't even reinstall OSX from a USB key. I've created it on my MBPr, and tested it there : it ...
2
votes
2answers
2k views

How to install Mac OS X from Windows on MacBook Air?

I have OS backup .dmg installation file. The problem is I have Windows 7 on my MacBook Air, and I do not have access to OS X to use Disk Utility to burn/restore the OS X image. Is it possible to burn/...
2
votes
2answers
191 views

Disk Utility (recovery mode) stuck at loading

I want to do a clean install of el capitan OS. I booted to recovery mode, chose reinstall os x and followed the steps. So far so good. When it came to choose the destination disk where I wanted to ...
2
votes
1answer
474 views

Late 2011 MacBook Pro Cannot Install OS X

I have a late 2011 MacBook Pro (MD322LL/A) given to me by a friend. The hard drive was removed, so I put in a new one and have been trying to install OS X Yosemite. However, whenever I boot the ...
2
votes
2answers
2k views

Flashing folder at start up, all recommended troubleshooting has failed

I really hope someone might be able to help with this cause I am getting frustrated beyond belief. I have a MacBook Pro with Mavericks OS X 10.9. About a week ago it crashed while I was printing, ...
2
votes
1answer
18k views

How do i fresh install on used OSX 10.6.8?

I just bought a used macbook and i want to wipe it clean to start fresh. it didnt come up a dvd or anything. I tried following another post on here that said to push Option on start up and it sounded ...
2
votes
3answers
33k views

MacBook Pro: OS X reinstall is taking “forever”, (over 12 hours) to finish

This is my first time ever dealing with a Mac OS X reinstallation. About a week ago, while working online, my MacBook Pro just started to be very very slow to do anything. I would get the WHEEL ...
2
votes
4answers
23k views

-1006F error message when trying to recover mac

my macbook pro crashed and i sent it for repairs.. so the guy installed a new hard drive but then sent it back with a screen having a flashing folder with a question mark.. so i looked at this page ...
2
votes
3answers
87 views

Do i get a Mac OSX DVD when i buy a Mac Mini computer?

And if not, how do I reinstall the system in case one day everything goes wrong? Thank you.
2
votes
1answer
2k views

Mountain Lion, EFI and Intel SSD Toolbox

Here's the problem: I want to do a clean install of Mountain Lion on my (custom) Intel 520 SSD inside my iMac. The first time this SSD was setup, it was done by a certified Apple Retailer. This time,...