• Chris (11/11) Oct 24 2013 I installed the latest Java update for Mac last Tuesday (7u45).
• Jacob Carlborg (10/19) Oct 24 2013 If you boot your computer and hold down Command-V it will boot in
• Kagamin (1/1) Oct 24 2013 Install it again and see.
• Chris (7/8) Oct 25 2013 Thanks. I had already tried all of the above. Disk utility,
• Jacob Carlborg (4/11) Oct 25 2013 What did the verbose mode say?
• Chris (8/22) Oct 25 2013 Once it said in single user mode.
• Jacob Carlborg (6/13) Oct 26 2013 If you want to be able to solve this you need to read the output of the

"Chris" <wendlec tcd.ie> writes:

I installed the latest Java update for Mac last Tuesday (7u45). 
When I shut down the Mac, I noticed that it took ages (several 
minutes), then today (didn't use it on Wednesday) it wouldn't 
boot. All it showed me was a white screen. I tried all the 
recommended remedies, but nothing would help. I finally restored 
it from a Time Machine backup that was pre Java 7u45. Now the Mac 
works again.

I wonder if it was the Java update or something else. I 
downloaded it from 
http://java.com/en/download/mac_download.jsp?locale=en.

My system is 10.8.4

Jacob Carlborg <doob me.com> writes:

On 2013-10-24 23:39, Chris wrote:
 I installed the latest Java update for Mac last Tuesday (7u45). When I
 shut down the Mac, I noticed that it took ages (several minutes), then
 today (didn't use it on Wednesday) it wouldn't boot. All it showed me
 was a white screen. I tried all the recommended remedies, but nothing
 would help. I finally restored it from a Time Machine backup that was
 pre Java 7u45. Now the Mac works again.

 I wonder if it was the Java update or something else. I downloaded it
 from http://java.com/en/download/mac_download.jsp?locale=en.

 My system is 10.8.4

If you boot your computer and hold down Command-V it will boot in 
verbose mode. This let you see what's going on and possibly what's 
actually causing the problem.

You can also boot in single-user mode. This will get you a minimal shell 
environment allowing you to fix the problem, like remove files causing 
the problems.

http://support.apple.com/kb/ht1492

-- 
/Jacob Carlborg

"Kagamin" <spam here.lot> writes:

Install it again and see.

"Chris" <wendlec tcd.ie> writes:

On Friday, 25 October 2013 at 06:54:32 UTC, Kagamin wrote:
 Install it again and see.

Thanks. I had already tried all of the above. Disk utility, 
single user mode (with fcsk -fy etc), safe mode or whatever, you 
name it.

I had to restore it from my Time Machine backup and it works fine 
(only lost a few files I had backed up elsewhere anyway). All I 
know is that it happened after the Java update 7u45.

Jacob Carlborg <doob me.com> writes:

On 2013-10-25 10:36, Chris wrote:
 On Friday, 25 October 2013 at 06:54:32 UTC, Kagamin wrote:
 Install it again and see.

 Thanks. I had already tried all of the above. Disk utility, single user
 mode (with fcsk -fy etc), safe mode or whatever, you name it.

 I had to restore it from my Time Machine backup and it works fine (only
 lost a few files I had backed up elsewhere anyway). All I know is that
 it happened after the Java update 7u45.

What did the verbose mode say?

-- 
/Jacob Carlborg

"Chris" <wendlec tcd.ie> writes:

On Friday, 25 October 2013 at 12:40:10 UTC, Jacob Carlborg wrote:
 On 2013-10-25 10:36, Chris wrote:
 On Friday, 25 October 2013 at 06:54:32 UTC, Kagamin wrote:
 Install it again and see.

 Thanks. I had already tried all of the above. Disk utility, 
 single user
 mode (with fcsk -fy etc), safe mode or whatever, you name it.

 I had to restore it from my Time Machine backup and it works 
 fine (only
 lost a few files I had backed up elsewhere anyway). All I know 
 is that
 it happened after the Java update 7u45.

 What did the verbose mode say?

Once it said in single user mode.

HD seems to be ok.
HD has been changed.

I ran fcsk -fy again (as recommended) and it was fine. Disk 
Utility also said it was fine.

I cannot think of anything else that could've wrecked my Mac, 
except for the Java update.

Jacob Carlborg <doob me.com> writes:

On 2013-10-25 15:38, Chris wrote:

 Once it said in single user mode.

 HD seems to be ok.
 HD has been changed.

 I ran fcsk -fy again (as recommended) and it was fine. Disk Utility also
 said it was fine.

 I cannot think of anything else that could've wrecked my Mac, except for
 the Java update.

If you want to be able to solve this you need to read the output of the 
verbose mode. The last output might be available in some log file, 
somewhere.

-- 
/Jacob Carlborg