Hi there, I want to reinstall OSX on my Macbook but the installation fails halfway with a "couldn't install/complete" error message. It started with performance hiccups and freezing and some other OSX problems after waking the machine from standby/sleep. I reckoned I must have either installed something that caused it or the System, which was updated all the way from Lion to Sierra, just gave in with all the bloat. It could very well be the RAM or SSD, but the SSD mounts ok when used externally. So far I tried: - Removing the SSD, formatting it externally with my other machine (Journaled), no errors - Verifying and repairing the disk with Disk Utility, with no errors. - Exchanging the RAM, with no change in the macs behaviour. - Using the Apple Hardware Test to determine whether something is wrong internally (no errors, even on extensive mode) - Used a bootable USB drive with Mavericks and El Capitan, trying to reinstall. But no luck so far, both fail with the same error. - Used Internet Recovery to install Lion, which also fails midway. - Checked the temperatures. Maybe the old CPU can't handle the installation stress. But temperatures are idling at around 50-60° Celsius. Not ideal, but not to worrying either. - Used Terminal to set the date of my machine to an appropriate day/year, to avoid any verifying errors regarding the Installers. Everything seems to be pointing at hardware failure. But the mac boots up as usual and I can navigate the installation process normally. Only after starting the installation, it either freezes or resolves in an error message. It could be the battery (an original from 2011)... Maybe someone here can point me in the right direction, although this might be irreversible. I uploaded an error log from trying to install Lion. Thanks for any tips!