If Mac is failing to go to sleep or is waking up unexpectedly, you can run pmset -g log | egrep '\b(Sleep|Wake|Start)\s{2,}' in terminal to inspect last sleep/wake events
Installing Mac OS X on iMac's blank formatted hard drive. Installation runs for 5-10 minutes and then fails with following error:
An error occurred while preparing the installation. Try running this application again.
Tried installing OS X El Capitan (10.11) and OS X Sierra (10.12) - the same error occurs in both cases.
L2TP/IPsec VPN successfully connects to a remote VPN server, but Mac OS still has no access to the remote network.
To resolve the issue I had to select "Send all traffic over VPN connection" in VPN network Advanced settings.
These instructions shows how to merge an original iMac Fusion drive that for some (installing Windows, messing with Disk Utility) was split into separate SSD and HDD drives.
Warning: performing below steps will irrecoverably wipe both SSD and HDD drives. Make sure you have all your data backed up.
