So I dabble with blender from time to time, and while I'm no expert, I consider myself somewhat accomplished with it. The main difficulty in blender is the _steep_ learning curve. That being said, I still haven't made the transition from 2.4 to 2.5x(until today). One of the first things I noticed is that my middle mouse button ceased to function as it had in 2.49b. After some searching and tweaking, here's what I found.
Problem Statement:
You're trying to run blender 2.5x on Mac OS X >= 10.6.0, but your MMB (alt-click in blender 2.49) has lost its functionality.
SOLUTION:
Modify your default 'User Preferences' to allow the same button configuration from 2.49 to work in 2.5x.
Open up blender 2.5x, and ensure you are in a new project.
Go to 'File' > 'User Preferences...'.
In the panel that opens (Blender User Preferences), select the 'Input' tab at the top.
In the middle of the panel there should now be several expandable nodes: 'Window', 'Screen', 'View2D', etc.
Expand '3D View', then expand '3D View (Global)'.
Press the 'Edit' button on the right.
Click on the 'Middle Mouse' label in the third row(Rotate view).
It should now prompt you with 'Press a key'.
Hold down the alt/option key on the keyboard and click the 'Press a key' label.
The label will change to 'Alt Left Mouse'.
You can then systematically go through that entire list changing every instance of "<key(s)> Middle Mouse" to "<key(s)> Left Mouse" if you want.
(Personally I only change 'Rotate view'(as above), 'Move View'(to 'Shift Alt Left Mouse'), and 'Zoom view'(to 'Ctrl Left Mouse'))
When you are done changing things, make sure you click the 'Save As Default' button on the bottom of the panel. If you want to switch it back, you can always just go back into 'User Preferences' and press the 'Left arrow' button next to the rule you changed. You can also restore all of the defaults by pressing the 'Restore' button next to the tree node you have edited.
-H
Problem Statement:
You're trying to run blender 2.5x on Mac OS X >= 10.6.0, but your MMB (alt-click in blender 2.49) has lost its functionality.
SOLUTION:
Modify your default 'User Preferences' to allow the same button configuration from 2.49 to work in 2.5x.
Open up blender 2.5x, and ensure you are in a new project.
Go to 'File' > 'User Preferences...'.
In the panel that opens (Blender User Preferences), select the 'Input' tab at the top.
In the middle of the panel there should now be several expandable nodes: 'Window', 'Screen', 'View2D', etc.
Expand '3D View', then expand '3D View (Global)'.
Press the 'Edit' button on the right.
Click on the 'Middle Mouse' label in the third row(Rotate view).
It should now prompt you with 'Press a key'.
Hold down the alt/option key on the keyboard and click the 'Press a key' label.
The label will change to 'Alt Left Mouse'.
You can then systematically go through that entire list changing every instance of "<key(s)> Middle Mouse" to "<key(s)> Left Mouse" if you want.
(Personally I only change 'Rotate view'(as above), 'Move View'(to 'Shift Alt Left Mouse'), and 'Zoom view'(to 'Ctrl Left Mouse'))
When you are done changing things, make sure you click the 'Save As Default' button on the bottom of the panel. If you want to switch it back, you can always just go back into 'User Preferences' and press the 'Left arrow' button next to the rule you changed. You can also restore all of the defaults by pressing the 'Restore' button next to the tree node you have edited.
Just found your posting regarding this problem. Now I have exactly the same problem with 2.63. Your solution changes the behaviour for the 3d view but my ortho views (top, front, right) just refuse to pan no matter what key combo / mouse button I use or what I change in the prefs. It zooms like expected and all other mouse functionality works as far as I can say. But pan just won't work. Any ideas?
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