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[Solved] Very slow Windows 10 in High Sierra
Posted: 7. Jan 2018, 19:41
by renecek
Hello,
I'm new user of Virtualbox. Installed it on my MacBook Pro 2016 with latest official High Sierra. Installed official Windows 10 Pro 64-bit with bought licence key. I have a problem, windows works very slow. It's like if you play some game with low FPS (don't explain it better).
Using windows in work only for network tools like winbox, some ONT tools etc.
Attaching logs, hope somebody helps me.
Thank you.
Re: Very slow Windows 10 in High Sierra
Posted: 8. Jan 2018, 11:06
by socratis
00:00:01.277913 Host RAM: 8192MB (8.0GB) total, 3723MB (3.6GB) available
00:00:01.483870 RamSize <integer> = 0x0000000100000000 (4 294 967 296, 4 096 MB, 4.0 GB)
You might want to lower your RAM to 3072 MB. You're stressing out your host.
00:00:01.483867 NumCPUs <integer> = 0x0000000000000002 (2)
00:00:01.844788 CPUM: Physical host cores: 2
Again, your host has 2 CPUs, and you assign both of them to your guest. Your host is going to be stressed out. Use the Activity Monitor on your OSX host and the TaskManager in Windows to see if you don't have enough CPU power and adjust accordingly.
00:00:02.364775 GUI: 2D video acceleration is disabled
And so is the 3D acceleration. Shutdown the VM and enable them in the VM settings ยป Display. Then install the Guest Additions in the guest.
PS. For future reference you should ZIP your logs. It helps save a (virtual) tree or two...
Re: Very slow Windows 10 in High Sierra
Posted: 8. Jan 2018, 12:09
by renecek
OK so I:
- decrease RAM to 3072 MB
- checked task manager in windows, I see 2 virtual processors there
- turned on 2D and 3D acceleration
- installed guest additions
Works perfect now! Thank you so much

Re: Very slow Windows 10 in High Sierra
Posted: 8. Jan 2018, 12:11
by socratis
Glad you got it going. Marking as [Solved].