2011 iMac 27": cannot upgrade to latest OSX after replaced failing drive with blank new HDD. Nasty loop
65832
Can Recovery Mode install OS X onto a blank SSD?
135523
Data Error (Cyclic Redundancy Check) during hard drive format?
135949
Can I repair/reuse a dying hard drive?
92556
MacBook Pro refuses to boot/recover, hangs at "white screen"
97520
macOS Mojave won't install updates past 10.14.1 due to requirement for APFS formatting
155603
Is my HDD on the verge of failing?
7357
upgrade to 13.10 stalled and restart failed
79327
How do you perform a clean install of macOS High Sierra with APFS?
37449
iMac only show flashing folder with question mark after formatting OS X partition drive
72158
How to recover data from a failing hard drive?
41161
Unable to mount Windows 10 partition; it "is in an unsafe state"
149040
OS X Internet Recovery doesn't see SSD drive
128411
Can't mount HFS+ drive, bad superblock?
53906
How can I mount partition disk0s4 that became inaccessible after a clean installation of Mountain Lion?
135981
How do I reinstall macOS to my Mac after formatting the main drive accidentally?
12256
How to recover data from a USB-connected hard disk that shows no partition?
90062
How would I identify what's causing my Mac to permanently hang on shutdown?