Acorn 4.1 – Bitmap image editor.

Acorn 4.1Acorn is a new image editor built with one goal in mind – simplicity. Fast, easy, and fluid, Acorn provides the options you’ll need without any overhead. Acorn feels right, and won’t drain your bank account.

  • Take screenshots using Acorn and edit them right away.
  • Chain together image filters to create stunning effects.
  • Layer based image editing, an industry standard.
  • Make new images and layers using your built-in iSight.
  • Easy image and canvas resizing, just by changing the size of your window.
  • Take advantage of every pixel of your monitor with full screen image editing.
  • Tablet sensitive for pressure strokes and using the tablet’s eraser.
  • Vector shape and text layers.
  • Freeform, elliptical, rectangular, and magic wand selections.
  • Gradients.
  • Create and apply custom text styles.
  • Control opacity and blending modes for each layer.
  • Write plugins using the Python scripting language, as well as in Objective-C.
  • GPU powered. The same graphics card that makes your gaming experience smooth, helps Acorn fly through the toughest of graphics operations.

What’s New

Version 4.1:

    • New: When exporting an image as JPEG, you can now choose an option to save it as a CMYK image.
    • New: You can now flip the canvas vertical or horizontal via the Image > Flip Canvas Horizontal / Vertical menu items.
    • New Background Blur filter which will blur the background images behind the current layer, and then mask that blur based on the contents of the current layer. Pro Tip: use white text or boxes to show the blur.
    • New: New Mirror filter which will reflect your image in the x and y directions.
    • New: Acorn now has a spotlight importer so you can search for acorn images by layer name, text layer contents, width, and height.
    • New: When editing a layer name, hitting the tab button will now select the next layer for editing. To end editing, press enter.
    • New: You can now change the location and dimensions of a crop with the keyboard. Use the arrow keys to move it around, hold down the option key to change the crop size with the canvas, and hold down the shift key to move or resize in 10 point increments.
    • New: Support for multipage TIFF files. If you've got access to a fancy scanner that will place multiple images in a TIFF file, Acorn will now open up each of those pages as a new layer.
    • New: If you have multiple layers selected, holding down the command key and clicking on a layer in the canvas will now select the first layer under the mouse click.
    • New: If you are viewing your image in shape vector or shape outline only mode, you'll now get a little bit of status text at the bottom of the window letting you know this.
    • New: The number of decimal places for the fields in the levels window has been increased for finer control over your adjustments. Plus, it's a forward looking change- we're not always going to be working on only 32 bit images!
    • New: When you export an image, Acorn will remember what file type you used last time you exported.
    • New: The Shape Quick Config (View > Quick Config Popover) now has alignment options for the selected shapes.
    • New: The the Shape Quick Config popover looks a lot better these days.
    • New: If you copy a layer's filters to the clipboard and then select multiple layers, you can now paste the copied filters into all the selected layers instead of just the first one.
    • New: You can now set the red, blue, or green biases when using the Grayscale filter.
    • New: Shape layers now respond to the Layer > Rotate and Transform > Flip Layer Horizontal / Vertical menu items.
    • Newish: Exporting as a PDF will try and make a 100% vector PDF if there are no bitmap elements or strange blend modes to get in the way.
    • Change: When editing a filter field value, you can now press enter to apply the value. Previously pressing enter would flatten the filter (and now command-enter will flatten the filter).
    • Change: After editing a layer name, the canvas now becomes the main window, so cmd-a to select everything (and other shortcuts) will operate on the canvas and not the layers list.
    • Change: When you've got one or more layer filters on a bitmap or group layer and you being moving the layer image, any filters with center parameters will be moved along with the layer, keeping the location of the filter in sync with where you originally put it.
    • Change: The brush designer is better about interpreting values you put in the various number fields.
    • Change: Removed the Image ▸ Invert menu item since it duplicated the Filter ▸ Color Effect ▸ Color Invert filter.
    • Change: If you have the move tool active and then select a shape, the palette for that shape will then become active.
    • Change: If you have a shape tool selected holding down command and shift at the same time will allow you to select multiple shapes (previously it would only allow a single shape to be selected this way).
    • Change: When using the difference boolean operation on selected shapes, contiguous paths will now be broken up into their own independent shapes.
    • Change: Previously single clicking with a shape tool on the canvas would cause a shape with some default values to appear. In Acorn 4.1 you now need a double click to do this - single clicking will no longer create a new shape by itself.
    • Change: No longer using JavaScript to parse the quick math you can use in pixel text fields, and using NSExpression instead, which is kinda neat.
    • Change: Updated to the SQLite 3.7.17, and Acorn now uses memory mapped undo databases (so undo writes are much faster now).
    • Change: When pasting shapes from a shape layer that were previously located in an area outside the current canvas, Acorn will now center them in the new canvas.
    • Change: Now showing a warning when trying to export a file in the Acorn file format without the .acorn extension.
  • Fix: Shape layers now have better hit detection for rotated rects.
  • Fixed a bug where nearest neighbor scaling wasn't correctly moving the origin for bitmap layers.
  • Fixed a bug where the fuzz stroke filter didn't look correct when viewing your image at less than 100% magnification.
  • Fixed a bug where option-dragging a bitmap layer in the canvas would show the wrong size for the preview on retina displays.
  • Fixed a bug where shapes would highlight like you could select them if you had multiple layers selected (you couldn't select a shape if you had multiple shapes selected though). However- you can now hold down the command key to select a single layer.
  • Fixed a problem where the background of a text box would sometimes flicker in and out when you were editing it.
  • Fixed a bug where you could move a locked layer if it was part of a multi-layer selection.
  • Fixed a little but where switching to another tool while a crop was in progress (and canceling the crop) would cause the tool not to be selected.
  • Fixed a bug where trying to move a layer in the layers list while you were scaling + rotating the layer would cause the operation to fail.
  • Fixed a bug where flipping rotated ovals vertically wouldn't work correctly.
  • Fixed a bug where double-clicking on the layer filter widget in the layers list causes the layer name to become editable.
  • Fixed a bug where using the Add Border to Layer filter wouldn't work correctly if your bitmap layer had a negative origin.
  • Fixed a regression where the Edit ▸ Fill window wouldn't work correctly when you had a selection.
  • Fixed a bug where Acorn would not complain that you were trying to crop a locked image when you had autosave and versions turned on.
  • Fixed a little lag that sometimes occurred when using the brush tool.
  • Fixed some redraw issues when moving a control point on a bezier curve.
  • Fixed a bug in the web export window where a chevron wasn't showing up on the image format table.
  • Fixed a bug where the clone tool wasn't updating the canvas correctly when you were cloning with a selection. Also managed to speed up the clone tool a bit.
  • Fix: There was a bug when resizing certain square images in web export would case the aspect ratio to be incorrectly applied.
  • Fix: You can now use the undo/redo keyboard shortcuts from the shape quick config popover.
  • Fix: The Opacity filter slider now shows as a percentage again, along with the opacity sliders for the Shadow and Inner Shadow filters.
  • Fixed a bug where text would sometimes temporarily disappear when cropping.
  • Fixed a bug where copying and pasting a bitmap layer with a non-zero frame origin would set reset its origin to zero.
  • Completely removed the Acorn 3 filter interface (which was only available thorough a secret keyboard shortcut).


Intel, 64-bit processor
OS X 10.8 or later

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