Grumpy Old Geeks Topics Mac migration data loss Topic Mac migration data loss 2 mentions in 1 episode The speakers compare cases of missing files or erased drives after Mac migrations and updates. Mentions 491: Set Democracy to Zero Jan 13, 2021 46:10 I did try the built-in disk repair, and unfortunately, it was to no avail. 48:19 that disk is empty. You have to format it.