Of course, if you think its okay for me to do the upgrade to El Capitan without backing up, then the drive only needs to be compatible with El Capitan and not Snow Leopard as in point #2 above.

Compatible with both Snow Leopard and El Capitan Compatible with early 2009 24-inch iMacĢ. So Im basically looking for an external hard drive that meets these criteria:ġ. I would also like to use the built-in Time Machine feature of the iMac to do the backups. I would like to upgrade the OS to 10.11.6 (El Capitan), but it is recommended by Apple to backup my system first. Don't stray from them and tamper with instructions you don't understand.I have an early 2009 24-inch iMac desktop running OS X 10.6.8 (Snow Leopard).

Only follow the Program Setup prompts.

But if you're using macOS or OS X, you'll see 'WD Apps for Mac'. If you don't see the 'WD Apps Setup', search for a folder called 'WD Apps for Windows'. This will start the Backup software installation process.

Double-click it and select 'Create WD Applications'.

If you're on a Mac, navigate to 'My Machine' to see the new hard disk.

It might take a few seconds to do this, so be a little patient.

If you're using Windows, the drive will now be turned on, showing up in 'My Computer'.If you have a USB 3.0 port on your system (it's usually blue, especially for Windows systems), use it because it can make a big difference in the speed of the transfer of files. Plug one end of the USB cable into the drive and the other end in your system.

Plug the wall/power bar and let power enter it.The difference is clear, isn't it? Tips on using WD my Passport for Mac To elaborate, you can upload a 2-hour HD video in just 5 minutes! But if it was USB 2.0, it will take at least 13 minutes or more. If your WD drive is plugged into a USB 3.0 port, you can easily access and save files 3 times faster than what USB 2.0 port is capable of.

Wd access for mac os 10.6