We've a 2009 iMac which often refuses to properly (screen stays black) wake.
It's been like this for probably a year or more, and has persisted through various system updates, and a variety of suggested fixes.
Were it mine, I'd have done a fresh install of system plus all apps ages ago - but as it's my wife's and would 'my ... is messed up' require more resetting of various prefs than I'm comfortable with I've thus far resisted it.
But, continuing repeated hard restarts followed by fsck is clearly not wise, so...
It's been like this for probably a year or more, and has persisted through various system updates, and a variety of suggested fixes.
Were it mine, I'd have done a fresh install of system plus all apps ages ago - but as it's my wife's and would 'my ... is messed up' require more resetting of various prefs than I'm comfortable with I've thus far resisted it.
But, continuing repeated hard restarts followed by fsck is clearly not wise, so...