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Fix: IA App name cookie write failed... when creating bootable installer

As a heads up, if anyone who is trying to create a USB installer is experiencing this issue, the fix is simple.





You need to apply 'Full Disk Access' to Terminal.


Settings > Security & Privacy > Full Disk Access then click on the + and locate Terminal.



Once you run the command again:


MacBook Pro 13″, macOS 10.15

Posted on Nov 12, 2020 7:36 PM

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Posted on Nov 29, 2020 5:55 AM

rjhherman wrote:

Apple should add this to their instructions on how to make a usb installer.

Feedback - macOS - Apple

3 replies

Fix: IA App name cookie write failed... when creating bootable installer

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