Preparing to install macOS Server. If you’re going to install macOS 10.14.4 on an existing computer and want a clean installation rather than an upgrade, use Disk Utility to erase the storage your volume is on. You can use Disk Utility when you begin installing. For instructions, search Mac Help for “Erase and reinstall macOS.”. Oct 12, 2019 Then restart the Mac. After the Mac reboots, try to install the macOS Catalina, Mojave, High Sierra again. If the installation get stuck when you try to update the Mac from Mac App Store, you may download macOS software from Apple website, which is the Combo updater which includes all the files required to update the macOS. Boot from Mac OS X installation disk / USB. Go to Utilities Terminal. Type date to check the current date and time. If it's incorrect, run following to fix the date and time: date mmddHHMMyyyy Where: mm - month, dd - day, HH - hour, MM - minute, yyyy - year; Clear NVRAM. Shut down the Mac.
- Oct 16, 2019 I have erased the hard drive on my iMac (Early 2008) and am trying to re-install El Capitan (10.11.6) that was running on it. It was acting up so decided a re-install was the best way to go. Followed the instructions and all went well until it it restarted.
- Apr 30, 2019 If you’re trying to update or install apps but the update refuses to start or you have stuck downloads in the Mac App Store, then try the following fixes. Cancel and restart. If you have stuck downloads in the Mac App Store or updates that won’t start, cancel them and try starting them again. Often, this will be enough to fix the problem.
Installing Mac OS X on iMac's blank formatted hard drive. Installation runs for 5-10 minutes and then fails with following error:
An error occurred while preparing the installation. Try running this application again.
Tried installing OS X El Capitan (10.11) and OS X Sierra (10.12) - the same error occurs in both cases.
Issue was resolved by fixing incorrect time on the iMac and then clearing NVRAM.
Fix incorrect time
- Boot from Mac OS X installation disk / USB.
- Go to Utilities > Terminal.
- Type date to check the current date and time.
- If it's incorrect, run following to fix the date and time: date mmddHHMMyyyy
Where: mm - month, dd - day, HH - hour, MM - minute, yyyy - year
- Shut down the Mac
- Start the Mac and as soon as you hear startup chime press and hold keys Command + Option + P + R.
- Keep holding the keys until Mac reboots and you hear another startup chime.
iMac 21.5' (2009)
Mac OS X El Capitan (10.11)
Mac OS X Sierra (10.12)
View the discussion thread.
- 2. El Capitan Features
- 3. El Capitan Download & Install
- 4. OS X 10.11 Problems
- 5. Mac OS X 10.11 Tips
- 6. Software for OS X 10.11
- 7. Compare OS
Mac OS X El Capitan can be downloaded directly from the Apple website. The Beta version of the OS is available but the final version will be made available towards the Autumn season of 2015 as speculated by many Apple users. You can use your older Mac OS with the new El Capitan, all you have to do is to create a different partition for the new El Capitan if you have the Yosemite already installed. There are few steps you should consider in downloading the latest El Capitan and these are as follow.
Part 1. Preparing Mac Device for the Installation of Mac OS X El Capitan
Both Mavericks and Yosemite are easier to download and install on Mac devices, however, this is not the case with Mac OS X El Capitan. Just before you install the new Mac OS X El Capitan, you must perform few tasks to ensure that your Mac will be ready for the installation of the software:
Preparing For Installation Machine
- Check Your Mac - Check whether your Mac will be able to run the new OS X 10.11. Apple has provided a list of the Mac supported by the new Mac OS X El Capitan and if you are already running the Mavericks or Yosemite, the same lists may also apply to the El Capitan. You can also check this list on the “Will your Mac run Mac OS X” article on Apple website.
- Create Enough Space - Check that your Mac has sufficient RAM to run the software. You wouldn’t run into any hitches if your Mac device is listed on the acceptable Mac devices for Mac OS X El Capitan. Apple recommend that you have a minimum RAM of 2G, however, a minimum of 4G space of RAM is highly recommended. You will also need to delete some unnecessary files to create more space for the installation of El Capitan.
- Check Hard Drive Space - Make sure you have sufficient hard drive space for the installation of Mac OS X El Capitan. Yosemite will normally require a Hard drive space of up to 5GB , but the new El Capitan will require between 15g and 20gb of space on your hard drive for successful download and installation.
- Register - Register to access the Mac Apple store. You need to upgrade your Mac and get access to Mac Apple store for a small fee in order to get the most out of your Mac OS X El Capitan.
- Updates - Make sure your third party Apps are updated before installing Mac OS X El Capitan. You can simply launch App store and click on “Updates” on the tool bar if you want to update the apps you bought from Apple store. For other third party apps, you may need some manual updates from manufacturer websites to complete such updates.
- Backup Your Mac - Perform a backup before downloading and installing Mac OS X El Capitan- you need to protect your important documents and files, thus you may have to back them up somewhere before starting the download and installation process.
Part 2. Installing Mac OS X El Capitan Safely on Your Mac Device
You can install or upgrade to Mac OS X El Capitan as a dual boot partition. You may be able to download a test version if you register for the OS X Seed program from Apple, and you can also provide a feedback to Apple in order for the company to update the software before it is finally released. You can follow these instructions to install the Beta version of Mac OS X El Capitan. It is strictly recommended that you perform a backup before you begin this process. It is important you keep in mind that Mac OS X El Capitan is still in a Beta format, thus , not all your apps or programs will work on it.
- Visit the Apple Beta software program page and log unto the page using your Apple ID. Simply click on “Enroll your Mac”.
- Click on the download link that shows up, and enter the personal redemption code given to you.
- Open the downloaded Mac OS X El Capitan software and preview the file in the Applications folder. Click “Continue” and then select “Agree”.
- Click on “Install” and then enter your admin password. You're all set!
Preparing For Installation Mac Os
Part 3. Installing Mac OS X El Capitan Safely on an External Drive
You don’t have to install Mac OS X El Capitan on your Mac device, you can also install it on an external hard drive, most especially when you want to access the OS quickly. You can consider Thunderbolt drives which are similar to the internal drives on Mac, or you can simply use the USB 3.0 external drive if you don’t have the Thunderbolt on your Mac. You will have to format an external drive before installing Mac OS X El Capitan, this will help to install the Mac OS X El Capitan safely on the hard drive and at the same time the configuration of your device will not be changed. Step 1. Launch Disk Utility
Connect the external drive to your Mac device and make sure it is detected. Launch the Disk Utility tool ( go to “Utilities” and you will find it there). Choose the drive- it is located at the side bar. Step 2. Partition
Simply click on “Partition”. Make sure the partition layout reads “1 partition”. Name the partition. You can use a name like “Mac OS X El Capitan”. Click on “Options” and ensure that the Guide partition table is chosen, and then click on “Ok”. Step 3. Options
Click “Apply'. Open the preview file from your Mac’s application folder. Click on “Continue”. Click on the “Agree” button. Step 4. Open
Click on “Show all disks”. Simply highlight the “External Hard Drive” on which you have just install the Mac OS X El Capitan Step 5. Install
Click on “Install”, and enter the admin password.