Photoshop CC 2017在Sierra下无法调节笔刷大小和硬度。

[红波刘24448009]

OPTION+鼠标右键弹出的是调节画笔对话框，数位板用起来也是相同，但在WIN下是没有问题的，不知道问题在那里！

[Jeff Arola]

On a mac the shortcut is

Control + Option + drag left or right

Default keyboard shortcuts in Adobe Photoshop

[红波刘24448009]

Thanks, on my Mac (Control + Option + drag left or right) is copy。Selects the brush tool mouse right key is brush tool board. 

[Jeff Arola]

What language are photoshop and operating system set for?

That's Chinese Simplified or Chinese Traditional?

Are you using a macbook or mac desktop with a mouse?

[红波刘24448009]

I'm Chinese Simplified, photoshop CC 2017 , Mac  Sierra 10.12, windows Key bard and Microsoft mouse .  thanks you.

[Jeff Arola]

Sorry, before i was responding from a macbook pro with a trackpad.

On one of our mac desktops with a windows keyboard and mouse it's

Ctrl+Alt+ Left mouse button hold and drag left or right for size

(use the actual Ctrl key, not the Windows logo key which subs for the Command key on a mac)

Of course you might have to look at your system preferences and see how the keys are set

Apple>System Preferences>Keyboard>Keyboard>Modifier Keys

[红波刘24448009 · Accepted solution]

very thanks,  The issue has been resolved. （Ctrl+Alt+ Left mouse button hold and drag left or right for size）According to the method you said the problem solved。