Experiencing this now, resetting Illustrator won't fix it.

As Lorenz reported, I quit out of Safari and it works again.

I'm experiencing this bug right now.

I run into this a lot, very annoying. Sometimes it gets fixed if I switch to the actual hand tool for a moment, drag the canvas around, then switch to another tool and then the spacebar hand-drag tool returns.

same issue

I have the same issue.

Illustrator 21.1 High Sierra 10.13.4
Intermittently the CMB+Spacebar shortcut for zooming and Spacebar for panning around a document stops working.
It appears to happen when Safari is running in the background. Quitting Safari usually seems to resolve the problem but sometime I have to restart Illustrator.

This has been an on again off again problem that needs to be fixed.

Thanks Nate, we will try this.

This is a very old bug (from as old as CS4) that NEEDS to be fixed. If you have Safari running with Illustrator, it will break the spacebar as hand tool along with a couple other features, like command+space to zoom.

Same issue

Here are my specs:

Mac Pro (Late 2013)
Version 10.13.3 (17D47)
Processor 3 GHz 8-Core Intel Xeon E5
Memory 32 GB 1866 MHz DDR3
Illustrator Version 22.1

I think I've found a little helping solution.
As soon as I quit my safari browser, the hand tool works again.
I don't know why those two programs are interrupt each other, but it works for now.

Just updated my illustrator and the spacebar Hand Tool is still broken.

Win7 Dell Precision M3800 laptop using the trackpad
Illustrator CC 22.1 (64 bit)

Has a solution been provided for this?! I'm having the same problem, here are my specs:

MacOS Sierra 10.12.5
Macbook Pro 2.5 Ghz Intel Core i7
16 GB 1600 MHz DDR3

Illustrator CC 22.0.1
I have Windows 10 installed through Bootcamp

In an attempt to work around this, I opened Photoshop and guess what... Hand tool is stuck there also. There has to be more people hitting this issue? The tools are totally unusable!

Hudson Graham, I feel your pain.

My mac must have updated over night and when I start Illustrator now it is stuck on the hand/grab tool. I have tried turning off GPU Performance (mentioned in other forums), but nothing works, Illustrator is now useless.

Ouch, Anonymous! My mac is so old, I don't think any of my other software will run if I go back to the original OS. It's nice that you got a human from Apple to tell you this.

I would like a human from Adobe to speak to me about this. It seems in all the years we've been using computers, operating systems upgrade, and other software follows suit to be compatible.

Why doesn't Adobe update Illustrator to be compatible with High Sierra? Can the answer really be that we have to go BACKWARDS to keep using their software effectively and efficiently?

Please, Adobe, please make Illustrator CC compatible with High Sierra.

I think that's what I invest my monthly fee into: constant updates, the latest and the greatest. Seriously!

I have contacted both Adobe and Apple, the main issue is Apple's new upgrade to High Sierra means there is a new way of saving files and the format at which the save, this causes issues with Adobe and therefor causes glitches in the illustrator and indesign softwares. To fix the issue you have to back up your computer, Factory reset your Mac and install the OS that came with the Mac. Then re-download everything. The High Sierra will NOT allow you to revet to older operating software and therefore causes a major flaw in the operation of external software. Hope this helps.

Apple told e this over the phone. They were very clear about the issue and this is the only permanent ATM.