Get Ready for a Clean Installation of Mac OS X Mavericks using a Bootable Install Drive

When it comes to maintain the performance of your Mac, you must be taking proper care of it, mustn’t you? So what are the steps you take in order to keep your Mac healthy? Anyway, we can think of some general steps people usually follow, such as not overfilling the hard drive, installing a professional speedup Mac tool and something like that. However, you only know how healthy your Mac is. In fact, I do not have any reason to say that your Mac cannot be healthy if you keep it clean. It can surely be healthy; however, all what matters is the efficiency of the speedup tool you are using.

Like millions of Mac users around the globe, you might also have upgraded to Mavericks – the latest (10.9) version of Mac OS X. However, complaints like gradual downfall in performance, sluggish startup, etc. are like, never apart from the Mac OS X. On the other hand, many of you are still looking for a clean way to install mavericks on their Mac systems. For all such users, I am going to discuss a process to put a clean installation of Mac OS 10.9 Mavericks on a compatible Mac system.

Creating Mac OS X Mavericks Bootable USB of Hard Drive

In case your Mac OS X Lion or Mountain Lion is running slow like a snail, and you want to upgrade to the latest version, here is the right time to start with. For this, all you need to do is go to online Apple Store and using your login credentials. Luckily, Apple provides Mavericks update free of cost to its consumers. To proceed further, track the following steps:

• Once you download the Mavericks installer app from the Apple Store, locate it in the /Applications directory.
• Attach a USB flash drive (8 GB Min.) to your Mac.
• Launch Disk Utility and select the USB drive at the left.
• With the USB drive selected at the left, go to the Partition tab at the right.
• In the partition tab, click the ‘Volume Scheme’ drop down menu and choose ‘1 Partition’.
• Click ‘Options’ button and choose ‘GUID Partition Table’, and then click OK.
• Click Apply to save.

Once you are done with the above process, launch Terminal and run the following command to make all hidden files visible.

defaults write com.apple.finder AppleShowAllFiles TRUE;\killall Finder;\say Files Revealed

• Now, open /Applications directory and locate ‘Install OS X 10.9 Developer Preview.app’.
• Right-click ‘Install OS X 10.9 Developer Preview.app’ and choose ‘Show Package Contents’ in the context menu.
• In the folder that opens, navigate to Contents > Shared Support > and locate ‘InstallESD.dmg’.
• Now, double click the ‘InstallESD.dmg’ to mount it as a volume.
• In the volume than mounts, locate the ‘BaseSystem.dmg’ file.
• Launch Disk Utility (Applications > Utilities > Disk Utility) and drag the ‘BaseSystem.dmg’ file to the left pane of Disk Utility.

Important: By running the aforementioned command on Terminal, you make the ‘BaseSystem.dmg’ file visible, which by default is hidden.

• In the left pane of Disk Utility, highlight the ‘BaseSystem.dmg’ file and go to the Restore tab at the right.
• Now, drag the ‘BaseSystem.dmg’ file towards the right and drop it into the Source field.
• Likewise, drag the USB attached earlier to the Destination field in the right pane.
• Make sure the selected drives are correct, and then click the Restore button.

Once the process to create a bootable USB drive is finished successfully, exit Disk Utility. Please note that the contents of the destination drive (i.e. USB drive) will be erased. Therefore, make sure it contains no data.

• Open Finder and browse the bootable USB drive.
• On the bootable USB, locate the folder System > Installation and delete the file named ‘Packages’ because it is an alias (see the detail under ‘Kind’ column).
• Now, copy the ‘Packages’ folder located in the ‘OS X InstallESD’ mounted volume and paste it into the USB drive.
After the ‘Packages’ folder ends up copying, the USB drive is ready and can be used to install Mac OS X Mavericks on a Mavericks compatible Mac.

Clean up Mac Drive

Once the bootable USB drive is ready, you can put a clean install of Mac OS X Mavericks on your Mac system. Before that, I suggest cleaning up Mac drive for system junks, temporary system files, cookies, large files, and a lot more types of trash that unnecessarily utilize the system resources as well as the disk space. For this, you can use a commercial cleanup Mac application. However, use it with required and proper product information.
With a cleanup application, all you need to do is scan the hard drive thoroughly or with a manually set scan preferences. Once you clean up all the trash efficiently, go through the steps mentioned below to install Mac OS X Mavericks on a compatible Mac system:

1. Hook up the USB drive to your Mac, and then restart it.
2. Hold down the Option key when Mac is booting.
3. In the Boot menu, choose the USB installer and proceed.
4. In the Window displayed at the top of the left bar, click to launch Disk Utility.
5. In the left pane of Disk Utility, select the volume Macintosh HD and go to the Erase tab at the right.
6. In the Erase tab, choose Mac OS Extended (Journaled) in the Format menu and type-in a name for the Disk in the Name field.
7. Click the Erase button to start erasing the boot volume and wait for until the process is finished.
8. Once disk erase process is finished successfully, close Disk Utility and reinstall Mac OS X Mavericks from the main menu.
9. Choose the drive that you formatted recently for OS X installation, and then proceed with the selected options.

After completing the OS X installation, you see a fresh startup of the Mac OS X Mavericks. Now, you can move all your data back to the Mac from the backup.

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