Spacebar not working as quick hand tool on MAC – Adobe Illustrator

Hello, in my case, it was because I had 'Enable Full Keyboard Access' on my 'Settings' -> 'Accessibility' -> 'Keyboard 'ticked. Once I unticked that, I could use the spacebar as the quickhand tool again.

Same annoyance here.

I'm wondering why the keyboard shortcut editor does not allow space bar instead of H as a shortcut to the Hand Tool. Toggle switch instead of momentary switch for the the tool would not be ideal, but at least there would be some kind of access to the tool through space bar.

This just happen to me and for me I narrowed it down to a sleep issue. The problem occurs when I wake it from a sleep, the spacebar does not work. To resolve the issue, I have to put the computer to sleep, wait a couple seconds then wake the computer. (On occasion I have to switch out of Illustrator to another app before I put the computer to sleep)

Definately a frustrating issue. Hopefully this solution works for others...

Just had the same problem. Restarting the computer worked for me... no idea what caused it. 

Just adding my voice. In my case it was also MS Word. Super strange because I've been using it along Adobe apps for many years. I just moved to a new startup drive, same setup (iMac 5K 2019, macOS Monterey 12.4, latest Adobe and Office), using macOS's Migration Assistant, so basically, the only difference with yesterday is I only the fact that I had to log back in in both Adobe and Office apps. 

As soon as I quit Word, the spacebar shortcut started working again in Adobe apps. But now, no matter what I do (launch Word before or after my Adobe apps), I cannot reproduce the bug. Mystery!

Farking hell what a damn mess. Sort it out @adobe

In my new IMac, space bar works as a SAVE option and prevents adding space between the text. couldnt find any solutions useful?

Potentially helpful answer: This was happening to me; Found the thread; Read answer about some other program snatching priority for keybind; Noticed "Wacom Desktop Center" was running; Shut it down; Problem fix without even closing PSD! Restarted Wacom DC for test; No issue for PSD; Sus: which program opens first? Contribute Research: send.

Editor's Note: Using Intuis BT S Pen Tablet Model CTL-4100WL on a macOS Monterey Version 12.2.1 Macbook Pro 2020.

First post. Life milestone achievement unlocked.

I have been followin this thread for well over a year now.  And this still happens completely randomly and on multiple different computers.
The overall conscensus is that other applications are taking the priority away from Adobe in the use of the spacebar. I've heard Word, Outlook, Snagit, LastPass, Excel, Internet Explorer, Chrome and various other third party apps being blamed.
All these applications interupt the most commonly used keyboard shortcut for years.... 

Adobe's response "..........."
So in other words, Adobe is saying. "Its not u, its them."
Deal with it. 

Internet Explorer was 'overiding' my hand dragging in both IND and ILLUS and new page drag in the indesign page panel. Quit Explorer and all working fine again. Open CS apps first on your machine.