Chosen Solution
Few problems. Some updates was happening, but something went wrong. Now, after typing in my password its trying to load for some time, eventually ending up with a black screen with a white circle and a line (like a forbidden sign). So I cant boot up. I have tried these steps : Tried booting up on a external Mac test disc with catalina. I can see my internal SSD, but theres the normal one called MacHD that seems completely empty? Then theres also another partition/drive called Data, which seems to have some wierd files.When i try to use First Aid on MacHD, nothing happens. But when i try and use First Aid on the Data disc, it seems encrypted and asks for a code i dont remember (its not the same code as i use to login with)Is my SSD broken? I’ve tried searching google for a Macbook Air 1466 SSD adapter to sata or USB. I can find one that pops up, but that shows it only works for the 1466 (2012) version, say what? Update (02/18/2021) @danj Last 3 questions : Where can I read that my A1466 (2017) SSD is compatible/the same as the 2015 SSD you mentioned earlier?If i get the adapter to work, is it even possible to copy over data from an encrypted SSDIs it possible to do a clean MacOS installation on a encrypted SSD ?
The 2017 system uses the same SSD as the 2015 model (both are MacBookAir7,2) and both are 8.0 GT/s PCIe x4 interfaces. This is what I would use OWC Envoy Pro OWC appears to be falling asleep at the switch here as they didn’t update the page.
Regarding the two volumes that show up in Disk Utility, macOS Catalina introduced a new system volume which you can read about here. It sounds like the OS was damaged during the attempted software update. Since First Aid is not able to resolve the issue, I would recommend attempting to reinstall macOS. Here are some instructions to help you reinstall macOS on your computer. If you just need to backup your data you may need to boot into a bootable external drive running a similar version of macOS - from there you might be able to access the data on the internal drive. I hope this helps!
