Open Boot Camp Assistant for me.
Open Disk Utility for me. In the Disk Utility app on your Mac, select a volume in the sidebar, click the Partition button , then click Partition. Internal storage devices appear below the Internal section in the sidebar.
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External devices appear below the External section in the sidebar. When you select a volume that already has data on it, the pie chart shows a shaded area representing the amount of data on the volume and an unshaded area representing the amount of free space available for another volume.
Disk Utility also shows whether the volume can be removed or resized. Note: If you see a small volume with an asterisk, the partition is smaller than can be represented at the correct scale in the chart. Lyve Data Labs. Data Security. Our Story.
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Seagate Champions. Software Downloads. Instructions for installing an internal drive as a bootable or a storage drive in MacOS X. Physically install the drive into the Mac.
Launch Disk Utility
Power on the computer while holding down the option key. Select Installer.
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- Do a clean install.
- How to Partition an External or Internal Hard Drive in OS X.
Select Disk Utility. Highlight the drive.
Enter Volume information Name, Format, and Scheme. Select Erase.
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In my case, I chose a size of GB, which is one-third of the drive. After this, it will take a few minutes to partition, so be patient!
When completed should see the green check mark next to your drive and it should say Operation Successful. Now to partition the rest of the space, you will click on Untitled under External and then click on Partition again. Give the partition a name, pick a size and choose the format.
My internal drive was already using GB of space, so when I typed in GB, it automatically changed it to GB and put up a message stating that the first volume cannot be removed and the volume could not be split because the resulting volumes would be too small. So if you want to create an additional partition, the first thing is to create a partition that will include OS X and give you some additional space for installing programs, etc.
Mac OS X 10.4 and earlier, or 10.5 and later with changes to the partition scheme
That means the partition where OS X is installed with have about GB of breathing room for extra data. Basically, we are just shrinking the original partition, which took up the entire disk to something smaller. Then we will partition the free space as we like. As you can see, I have made the original partition GB instead of 1TB, which frees up GB on the disk for creating other partitions.
As with the external hard drive, once the partition has been created, click on Untitled , but this time under the Internal heading and click on Partition.