Unzip and store it in your USB pen drive (FAT32 format).With the advances in technology, faster data access (SSD), and slimming hardware footprints, legacy technologies are typically the first cuts made to get these devices thinner and lighter while making them more powerful and efficient.3. Select the volume containing the bootable installer, then click Continue.Configuring SATA controller mode in BIOS Setup Make sure to configure the SATA controller mode. Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.Double-check what you’re erasing. Pick this drive and click Erase in the top menu. Wipe the drive clean with Disk Utility. This drive should have at least 16 GB of storage space. Now, it’s time to grab another USB flash drive and connect it to your Mac.Select your external hard drive and hit ‘Return’.Installing OS X has never really been a particularly difficult task, but try doing that on a MacBook Air or a system with a broken optical drive. Step 3 Once the booting has finished, your Mac will display the Startup Manager to show you the available boot drives. Step 2 Press down on the ‘Option’ key after restarting your Mac.Apple computer with Mac App Store (OS X 10.6.8+) Install OS X Mountain Lion.app (installer downloaded from Mac App Store) Creating a USB Installer for Apple OS X 10.7-10.8Before proceeding, we'll need the following items to complete the process: Luckily, Macs have a couple of options, specifically USB booting, and since most have an SD card slot, we can use those as well.
![]() Does Making A Bootable Usb Er Erase The Hard Drive On Your Current Laptop Mac OS X MountainNavigate the file structure Contents | Shared Support and drag the InstallESD.dmg file to the desktop. Right-click the file and select Show Package Contents. Upon completion of the USB formatting, locate Install Mac OS X Mountain Lion.app (downloaded in step #1 to the Applications folder, by default). Click on the Options button and select the radio button for GUID Partition Table and click OK. Select Mac OS Extended (Journaled) for the format-type from the drop-down menu. ![]() Launch Disk Utility and click on the OS X Install DVD from the left-hand menu. Insert Apple OS X Install DVD into Optical Drive. The process has not been tested with Restore DVDs and may not yield a reliable, OS X Installer USB. User account with Administrative access*Note: Install DVD must be the original DVD from Apple and not a Restore DVD that came with earlier model Apple computers & laptops. ( Figure G)Creating a USB Installer for Apple OS X 10.5-10.6The process is nearly identical, with a few alternate items to complete the process: ![]() Include multiple versions of OS X on the same drive.** Backup directories prior to initializing the HDD and/or reinstalling OS X.** Include additional resources on the drive that are required by your organization, such as Combo Updaters, applications or settings. Remember, this being a writable drive offers some additional perks over read-only media with a few caveats as well. Since this scenario requires reading data from the optical drive, it may perform slower than reading files that are located on the hard drive.Once completed, the USB drive will be bootable and have the full installation of OS X on there to install from scratch and update systems, as needed. If asked to authenticate, enter credentials that have administrator access and click OK to proceed. That may be contained therein. Loss/theft of USB drives and any additional data, such as configurations, passwords, etc. Choose the highest read and write speeds for your particular application to minimize this bottleneck. Read/Write speeds vary wildly depending on the make/model of the USB drive. Simple audio editing software for macThe steps are identical to the Creating a USB Installer for Apple OS X 10.7-10.8 tutorial listed above, except for two key differences. This means about 8GB of storage space per version of OS X. Multiple OS X versions on the same USB/SD card (Bonus)While writing this article, I found myself in a predicament - I only had a 8GB USB drive! But luckily, I found a 16GB drive I'd lent my wife awhile back and decided to try to get the two versions of OS X encountered most frequently (10.7 & 10.8) onto the same 16GB USB drive.And it worked! To achieve this, you'll want to have a USB/SD card capable of holding all the OSs on drive. A missing, modified or corrupt file could result in an unreliable installation. This is important as the OS X installer is looking for specific files at specific locations during installation. When booting to the USB/SD card by holding the Option key during start-up, the drives will mount with their new names making them easier to identify. Go through each to identify which version of OS X is contained, then simply rename it to a common name, such as 10.7 for the Lion installer 10.8 for Mountain Lion, etc. To resolve this, once the entire copy process has completed for all versions of OS X, the Finder will mount them all on the Desktop. While thoughtful, if working with multiple partitions, each will have the same name making them indistinguishable from the others. The copying process (steps #9-12) will now need to be repeated once for each version of OS X being stored.Tip: By default, Disk Utility names the partition identical to the source "Mac OS X Install DVD" in my case. If housing 10.5/10.6/10.7/10.8 8GB x 4 versions of OS X = 32GB total 4 partitions will then need to be created).
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