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May
5
awarded  Famous Question
Apr
5
comment View desktop of *very remote* Ubuntu box from my MacBook Pro
And if you're already running a VNC server on your mac (Screen Sharing for example), you can use a different local post with: ssh -L 5901:localhost:5900 username@remote_ip and then use vnc://localhost:5901. The 5901 port can be any unused port between 1024-65535 (or from 1-65535 if you're root)
Apr
5
comment Temporarily disabling RAM to mimic a lower spec machine?
If you're talking about enterprise grade virtualization like VMWare ESXi, then you're right @phyrfox -- about CPU speed. There is a performance hit on graphics and video processing which will be noticeable if running Mac OS X. I agree, Virtualization is the right solution when you want to adjust CPU frequency, available cores, hardware, etc. But this question was purely about limiting available RAM, and for that use case I believe that virtualization isn't the right solution.
Apr
4
comment Temporarily disabling RAM to mimic a lower spec machine?
If you're writing to a file, of=/Volumes/RAM\ Disk/random.dat, then you should be fine. if you're writing to the disk, of=/dev/rdisk9, then you have to be root, and it may have to be unmounted. (it should be unmounted, otherwise the system will get confused)
Apr
4
comment Temporarily disabling RAM to mimic a lower spec machine?
But the question was, "Is there some way to temporarily disable RAM without physically removing the chip?", so this does not answer the question
Apr
4
comment Temporarily disabling RAM to mimic a lower spec machine?
-1, sorry... this is not a good comparison. Now, you have virtualized video drivers, virtualized I/O, and a small CPU performance hit. I love Virtualization, but if all you want to do is see how the system would perform with less RAM available this is not a good solution.
Apr
4
comment Temporarily disabling RAM to mimic a lower spec machine?
You can probably just dump all the calculations of the disk size and let dd fill up the whole disk: dd if=/dev/random of=/Volumes/RAM\ Disk/random.dat bs=1024k
Feb
28
awarded  Notable Question
Feb
13
awarded  Notable Question
Jan
31
comment What would happen if I force installed a Linux driver into Mac OS X?
Also, there is a modprobe equivilent in OS X: kextload
Jan
19
answered Am I being monitored?
Jan
19
comment Application eating ~840,000,000% of my CPU
When this happens, what does the top -u terminal command show? How about the output of loadavg ?
Jan
19
comment Application eating ~840,000,000% of my CPU
100% CPU usage is 100% of one core. So on a Mac Pro, 1200% means 12 cores at 100% usage. Note that a hyper threaded core can go to 200% if both threads are fully utilized. I am reasonably sure that the images shown in the screen captures here are a bug.
Nov
21
comment Error opening txt file on MacOSx
Please post a screen capture of the error message.
Nov
5
awarded  Yearling
Oct
22
awarded  Notable Question
Oct
15
awarded  Nice Question
Sep
27
comment Are Macs vulnerable to the Bash shellshock bug?
These are irrelevant. Either of these, by their very nature, grant users access to run commands on the system, so if you have them enabled then it is your intention to allow users to run commands. The Shellshock bug is a means for users whom you didn't intend to be able to run commands to be able to do so, E.G. a user of the web server you run. So, your answer should say "Disable Web Sharing" (but that's just one thing to check)
Sep
27
comment Are Macs vulnerable to the Bash shellshock bug?
@JeffBurdges: regarding "Installation scripts usually use bash, creating privilege escalation risks", why would a malicious installation script need to use this exploit? If the user is installing a malicious installation script (a trojan horse) then the code wouldn't need to invoke this bug, it gets root anyway.
Aug
22
awarded  Nice Question