107
votes
GPU problem - Boot Hangs on Grey Screen
Background and explanations
Please read all of this post at least once from start to finish before taking any action.
All MacBook Pros from 2011 have a serious design defect. The thermal management ...
- 7,727
57
votes
How to mask images in Keynote into circles?
Yes.
This works for any shape. Here's how:
Draw a shape.
Resize it to the desired size.
Position the shape over the image.
Select both by shift-clicking them.
Choose Format → Image → Mask with Shape ...
- 1,131
42
votes
How do I combine two or more images to get a single pdf file?
Use imagemagick.
Install brew (https://brew.sh/)
brew install imagemagick
convert file1 file2 file3 output.pdf
files 1 through n can be any image or pdf file.
- 902
41
votes
Accepted
Is there a way to tell which files I accidentally renamed to *.jpg aren't actually JPEG images?
You can use file FILENAME to determine the type of data in a file.
$ file image.jpg text.jpg pdf.jpg
image.jpg: JPEG image data
text.jpg: ASCII text
pdf.jpg: PDF document, version 1.4
So, file *....
- 85.3k
30
votes
How to mask images in Keynote into circles?
Actually, it is unnecessary to create a shape in order to mask the image.
Place an image on the slide
Select the image
In the Menu Bar, go to Format > Image > Mask with shape > [select shape]
Now ...
- 9,100
20
votes
Scaling text in Keynote
My solution:
duplicate the slideshow,
resize the entire document (Document tab of the 'properties sidebar' > Slide Size dropdown)
copy the correctly sized elements back to the original doc.
Any ...
- 1,043
17
votes
Where does OS X store your current desktop picture?
In current versions of macOS (at least in Mojave, probably since Sierra, not sure about others) the location of the desktop pictures are stored in a SQLite database located at ~/Library/Application ...
- 291
17
votes
Is there a floating-ruler app for macOS?
I've used Free Ruler for Mac OS X in the past. I'm amazed that still works just fine. However, it does not allow click-through.
- 6,536
15
votes
Accepted
To install Brew's ImageMagick and fix its Symlink
A list of things to try, in order (I'm writing an answer instead of a comment for better formatting). Run hash -r after each step (assuming you're in bash; do rehash instead for zsh; or you can always ...
- 801
14
votes
Accepted
How do I resize an image in Notes?
In macOS, you can toggle between thumbnails and actual size (max width = 100%) by right-clicking any image in the note and choosing ‘View as Small Images’. This is not possible to set on iOS.
grg♦
- 185k
13
votes
How do I combine two or more images to get a single pdf file?
This can be done using Automator. Follow these steps:
Create a new Workflow.
Under Actions, Library, Files & Folders add the Get Specified Finder Items as a step.
On the bottom of that step click ...
- 131
12
votes
Are there any native tools for SVG conversion on OS X?
Try Gapplin. It works for me and creates PNG and JPG files from SVG. Simple and effective.
If you have a lot of SVG files to convert, ImageMagick is probably your best bet (available directly from ...
- 121
12
votes
How can I obfuscate a small section of a image on macOS?
Preview, built into macOS, has a few tools for doing this. First, open the image in Preview (the default app for images), then choose the Annotate button on the toolbar.
Options for obfuscating:
Use ...
grg♦
- 185k
11
votes
Why can't I see thumbnails in the finder?
This just happened to me and it was fixed by relaunching Finder:
Alt + Right Click Finder in the Dock > Relaunch
Cmd+Alt+Esc > select Finder > Relaunch
- 223
11
votes
Reduce opacity of existing image
Preview can't do this.
ImageMagick can, and nearly anything you can imagine.
You can easily install it with MacPorts (see MacPorts Home):
port install imagemagick
Let's say your original image is ...
- 11.2k
11
votes
Accepted
What is this card and what's its purpose?
Got it!
It's a Photoshop accelerator card.
Google books came up with this announcement from Computerworld magazine.
Screenshot from there -
- 98.6k
10
votes
GRUB 2 error – "fb: switching to radeondrmfb from EFI VGA"
There seems to be a problem with the radeon driver when booting. You can test a fix by doing this:
When you see the grub menu, press 'e', which will allow you to edit the entry.
Go to the line with "...
- 101
10
votes
Accepted
How do I view inline images in w3m?
Things you need to make this happen on macos:
1. Terminal emulator that supports sixel
iTerm2 recently added sixel support for viewing inline images. You'l need iterm 3.3 or later, which at time of ...
- 451
10
votes
Rotate Selection in Preview
Copy the selection.
Open the selection in a new document.
Rotate the new document.
Select and copy the new document.
Paste the new document into the original.
Re-position.
grg♦
- 185k
9
votes
Why can't I see thumbnails in the finder?
A couple of things to try.
Remove the Finder preferences file. The system will automatically regenerate it.
In Finder, press Shift ⇧+Command ⌘+G and enter ~/Library/Preferences.
Then find com.apple....
- 15k
9
votes
Is it possible to use old Wacom tablet on 10.11?
I finally solved this.
TLDR:
I managed to get my Wacom Intuos GD-0912-U (first generation Intuos A4 size) tablet working in High Sierra, with a fully functional Wacom Preference Pane, by using a ...
- 191
9
votes
Accepted
Is there a way to force "low power" graphics?
gfxCardStatus is an unobtrusive menu bar app for OS X that allows
MacBook Pro users to see which apps are affecting their battery life
by using the more power-hungry graphics.
https://gfx.io
By ...
- 4,395
9
votes
Change .jpg quality of terminal screenshots
Simply add the command:
sips -s formatOptions [low|normal|high|best|<percent>] ~/Desktop/AutoScreenCap/$vardate.jpg;
after the screencapture line.
Finally it looks like this:
while :; do
...
- 63.9k
9
votes
Can I flush, or release, my GPU memory?
There has often been problems with AMD based GPUs and their reporting of video memory usage in iStat Menu. This has in the past been for example always reporting 100% usage, always reporting a ...
- 65.8k
8
votes
How to quickly know the dimensions of an image?
Get Info
You can get the resolution from Get Info menu. Select the image and press ⌘ CMD+i, or right click on that image and choose Get Info menu item.
Image from cultofmac.com
QuickLook plugin
If ...
- 22.1k
8
votes
Is it possible to use old Wacom tablet on 10.11?
Just sum up all that been said here and in this thread:
https://discussions.apple.com/thread/6035388?tstart=0
1. Use a legacy driver
I've found a link for a driver that works:
http://cdn.wacom.com/U/...
- 181
8
votes
Finder windows just show screen artefacts
I found the solution here: https://www.maketecheasier.com/fix-google-drive-crashing-finder-in-mavericks/
A number of users who have upgraded their precious Macs to Apple’s newest OS, namely OS X ...
- 231
8
votes
Accepted
Can I use Preview to make this GIF file size smaller?
Yes you can. Open the gif in Preview and you'll get (I got) 48 images. Click on the "View" menu and select "Thumbnails" to display all images as Thumbnails. Give it a second or 2 to display all images....
- 13.2k
8
votes
Accepted
Can I flush, or release, my GPU memory?
I have found the answer to actually be 'yes' you can release (flush) the VRAM. Here's what worked for me:
I have a hot corner (MacOS) set to turn the display off, and when I activate it, even just ...
- 859
Only top scored, non community-wiki answers of a minimum length are eligible