3,943 reputation
123107
bio website identi.ca/grahamperrin
location United Kingdom
age 49
visits member for 3 years
seen 6 hours ago

Day job: IT support to CENTRIM and Brighton Business School – four days per week at Freeman Centre on University of Sussex campus, one day at Mithras House on University of Brighton campus.


6h
comment Macbook Air intermittently can't find startup disk
Thanks. It's possible that bad blocks were successfully reallocated before your run of the software. Now would be a good time to view S.M.A.R.T. data.
16h
revised What Window Management Options exist for OS X?
Added a note about EasySIMBL.
16h
awarded  Electorate
17h
comment Downgrade from OSX 10.10 Yosemite Beta to OSX 10.9 Mavericks
Roll back from … any newer OS … (2013-06-13)
17h
comment Roll back from OS X Mavericks ( or any newer OS) to Mountain Lion
For link purposes: Can I reinstall Mavericks after I got Yosemite? – there are multiple questions …
17h
comment Downgrade from OSX 10.10 Yosemite Beta to OSX 10.9 Mavericks
Can I reinstall Mavericks after I got Yosemite? – please note, there are multiple questions.
17h
comment Can I downgrade to Mavericks after installing Yosemite?
As there are multiple questions here, answers should aim to address each point. It's essential to distinguish between installation and downgrade. Chat
17h
comment Can I downgrade to Mavericks after installing Yosemite?
-1 for strictness; installing Mavericks over Yosemite should not be treated as an effective downgrade.
2d
comment Can the default permissions on /dev/disk* be changed?
Without wishing to confuse the question: amongst the advanced topics for VirtualBox, there's Using a raw host hard disk from a guest. Many times I tried but failed to get what's suggested working on OS X … some of my experiments involved attention to the modes of devices, and so this question interests me.
Jul
23
comment Is there a quick way to lock my Mac?
Caution! Preferring any amount of time will leave displays unlocked for at least part of that time. If the wish is for an immediate lock of displays, then the Security pane of System Preferences must be set to require a password immediately after sleep or screen saver begins. Please see the bountied answer.
Jul
22
answered How to erase the working blocks on a partially broken drive?
Jul
22
comment Is there TRIM support in OS X 10.6.9 for PowerPC?
From the First appearance … observation at apple.stackexchange.com/q/120271/8546 I initially guessed that support began with Mac OS X 10.8.1. So maybe Apple support for TRIM began late in Snow Leopard … then open sourcing of the code in Mountain Lion.
Jul
22
comment How should I reconcile dot-underscore files after a manual backup?
When I last checked, long ago, there was no file system capability check. So, for example, applying a dot_clean command to any part of an MS-DOS FAT32 volume would silently lose (be unable to merge) the content of ._ files in that part of the volume. Square peg, round hole ;)
Jul
22
comment Is there TRIM support in OS X 10.6.9 for PowerPC?
Please clarify the version number – there was no Mac OS X 10.6.9. 10.4.9, maybe? The OS X column at opensource.apple.com is a handy reminder of the 10.4.x transition from PowerPC to Intel.
Jul
22
comment How should I reconcile dot-underscore files after a manual backup?
Not only Finder. Utilities such as ditto(1) will preserve resource forks, HFS metadata, extended attributes and ACLs.
Jul
22
comment How should I reconcile dot-underscore files after a manual backup?
"… from a partition type that doesn't support extended metadata …"; the ._ files are already on HFS Plus.
Jul
22
answered How should I reconcile dot-underscore files after a manual backup?
Jul
22
answered Macbook Air intermittently can't find startup disk
Jul
22
revised Possible reasons (other than Open Firmware Password Protection) for not being able to boot into single user mode?
Mac Mini won't recognize Apple Aluminum Keyboard startup keystrokes
Jul
22
comment Possible reasons (other than Open Firmware Password Protection) for not being able to boot into single user mode?
Please edit your question to include: the model identifier of the Mac, its boot ROM version and SMC version – you'll find those in System Information; the and the make and model of the keyboard.