OLD MAC to NEW MAC external hard drive

Hi Tarabelle76,

Thank you for posting here in Apple Support Communities, and congratulations on your new MacBook Air! We understand that you're looking to move your iTunes music library from your older MacBook. According to what you're reporting, it sounds like the "erasing the disc" message you're receiving might be referring to your external drive. With that said, we'd like to offer a safer alternative to moving your iTunes music library over. Here's how: How to move your content to a new Mac

Please be sure to read through the entire article before proceeding.

Take care!

Tarabelle76,

We appreciate you providing us that additional information. Before using that external drive, we'd recommend that you reach out to the manufacturers for some clarity. We want to be sure that it doesn't require you to reformat your Mac computer.

As for the alternative option of moving over your iTunes music library, since you are using an older version of the Mac OS X software, we ask that you check out the information here: How to move data to your new Mac using Mountain Lion and earlier

Thanks!