I recently upgraded my mid-2010 27” iMac to internal SSD. I wiped the Mac and am not looking to recover any files, just restore it.
I was able to replace the stock HD with a new SSD without problems, then start it up with CMD + R into disk utility. I formatted the new SSD to APFS and named it “Macintosh HD”. I also used the disk utility “first aid” function to check the that there were no errors on the volume or container. The new SSD appears to be fine.
When I go to reinstall Mac OS (High Sierra), I’m able to select the new SSD and start the download. Unfortunately, I’ve done this several times and every time the download quits halfway through and goes straight to a reboot (no tone). Since High Sierra didn’t download correctly/completely, there’s no startup disk and the Mac gives me a white screen with blinking “?” File folder.
I’ve even tried the Same process after reformatting the SSD to Extended journaled (HFS+). That didn’t work either. I can’t boot up in safe mode because there’s no OS on the Mac (except the base system). I can’t select a startup disk because there’s no OS on the SSD. I’ve gone back to the APFS format on the SSD, but can’t get High Sierra to download onto it completely.
What am I missing? Thanks!
I was able to replace the stock HD with a new SSD without problems, then start it up with CMD + R into disk utility. I formatted the new SSD to APFS and named it “Macintosh HD”. I also used the disk utility “first aid” function to check the that there were no errors on the volume or container. The new SSD appears to be fine.
When I go to reinstall Mac OS (High Sierra), I’m able to select the new SSD and start the download. Unfortunately, I’ve done this several times and every time the download quits halfway through and goes straight to a reboot (no tone). Since High Sierra didn’t download correctly/completely, there’s no startup disk and the Mac gives me a white screen with blinking “?” File folder.
I’ve even tried the Same process after reformatting the SSD to Extended journaled (HFS+). That didn’t work either. I can’t boot up in safe mode because there’s no OS on the Mac (except the base system). I can’t select a startup disk because there’s no OS on the SSD. I’ve gone back to the APFS format on the SSD, but can’t get High Sierra to download onto it completely.
What am I missing? Thanks!