Want to open a PDF file and save it to your iPhone or iPad so that you can read it later? The best way to do that is by downloading the PDF file into the Books app, which runs on the iPhone, iPad, or iPod touch.

You’ll need Books (once called iBooks) installed to do this, which most people should have already, and at that point you can easily save any PDF and then access it later.

If you’re unfamiliar with the process, here is what you’ll need to do:

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Apple released the iOS 4.0.1 update to download for iPhone users today. The update addresses the signal issue that many iPhone 4 users have complained about, or as Apple says in the release notes: “Improves the formula to determine how many bars of signal strength to display”

Download iOS 4.0.1 Update for iPhone

The download is available for iPhone 3, iPhone 3GS, and iPhone 4 users.

To download and update your device, plug your iPhone into your computer and sync it with iTunes. Then click the Update button and you will be able to download and install the iOS 4.0.1 update.

If you’ve been to Google.com today you can’t possibly have missed their logo honoring the late Josef Frank, a famous architect. The crazy looking Google logo is actually a take on Josef Frank’s wallpaper designs, which are intricately detailed and quite fancy.

After seeing these, I thought they’d look great on my iPad, so I decided to make a few Josef Frank wallpapers for the iPad. Here are four that I created fitting the iPad dimensions, but they’ll work on on your iPhone too. Enjoy!

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SNES9x is a full featured SNES emulator for Mac that lets you do all sorts of things, including using an external game pad, customized controls, enter cheat codes and Game Genie codes directly into the game, create freeze states (ie: saving anytime anywhere), export movies of gameplay, and so much more.

It’s been out a while, but I just wrote about playing SNES on the iPad and realized that we’ve never covered the very SNES emulator for Mac that I mentioned in that article: SNES9x. Yes, there are other SNES emulators for Mac but I always find myself returning to SNES9x, I never have a problem with it and I’ve been able to play through games completely without a crash. In my opinion, it’s the most developed SNES emulator for the Mac platform, if there is a better one I haven’t found it yet.

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Need to access the current Finder directory immediately within the Terminal? While newer Mac OS X versions have an option to enable “New Terminal at Folder” in Services, prior releases do not, so instead you can get cdto, it’s one of those must-have apps for anyone who’s constantly switching between the command line and the Finder.

Installing cdto is simple, just download the app and place it somewhere in your Applications or Utilities folder, then drag the app directly into your Finder toolbar.

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Microsoft is busy trying to play catch up with Apple’s runaway success of the iPhone and App Store model. According to BusinessWeek, Microsoft is actually providing financial incentives and revenue guarantees to developers that create for their new Windows Phone 7 platform:

The company is providing financial incentives ranging from free tools and test handsets to funds for software development and marketing, said Todd Brix, a senior director at Microsoft who works with app developers. In some cases, Microsoft is providing revenue guarantees, and will make up the difference if apps don’t sell as well as expected, he said.

This is an interesting strategy considering Windows Phone 7 is an OS that doesn’t even exist yet, which is a large obstacle Microsoft faces at the moment. Trying to convince developers to work for an unreleased an unproven platform is no easy task, especially when there is a pervasive gold-rush mentality with developing for the iTunes App Store, and to a lesser extent with Google’s Android Marketplace.

Will this strategy work for Microsoft? If I had to guess I’d say they will closely emulate the iOS and App Store experiences, just like they are trying with the Microsoft Stores that are so closely modeled after the Apple Store. Hey, maybe they’ll even revive Internet Explorer for Mac and bring it to the iPhone? Jokes aside, Microsoft is a potentially fierce competitor to both Apple and Google in the mobile space, so this should get interesting very quickly.

Update: The final version has been released and everyone can now download iOS 4.1. You can do this through iTunes or with links to the iOS 4.1 direct download from Apple servers.

Apple has released iOS 4.1 beta firmware to developers, with SDK updates that incorporate the Game Center features. When it comes out of beta, this will be the first major update to iOS 4.

iOS 4.1 Compatible Devices

Firmware for iOS 4.1 has been issued for iPhone 3G, iPhone 3GS, iPhone 4, iPod touch 2nd and 3rd gen. Noticeably absent from the firmware lineup is the iPad.

Despite the speculation that the 4.1 release would include iPad support and unify the iOS across devices, it doesn’t look like there is iOS 4 support for iPad quite yet. Perhaps in future beta updates the iPad will join the iOS 4 party.

iOS 4.1 Download

Everyone can now download iOS 4.1, just launch iTunes.

To get the iOS 4.1 beta and SDK, you’ll need to be an Apple iPhone Developer.
* Login to developer.apple.com
* Download the firmware from the download links

Installing the iOS 4.1 beta is the same as any other iOS update. So far the only GUI difference that has been noticed is that the signal bars are more accurate. More to come!

All the jokes and iPhone 4 humor have finally gone mainstream. David Letterman featured the iPhone 4 on his famous ‘Top 10 List’ segment. Video is hosted below for now, but don’t be surprised if it gets pulled for copyright. Here’s the list repeated below:

David Letterman’s Top 10 Signs You’ve Purchased a Bad iPhone 4

• 10. To make a call, you have to insert a quarter
• 9. Automatically answers every call with a computerized, “Yello!”
• 8. Operates on 20 “D” Batteries
• 7. Pre-loaded with naked photos of Steve Jobs
• 6. You keep getting anonymous texts reading, “iPhone kill you”
• 5. Apple Store looks suspiciously like some dudes trunk
• 4. It smells and tastes like a pop tart
• 3. There’s no lather when washing your cornea (oh I’m sorry, that’s a sign you’ve purchased a bad eye foam)
• 2. You check your email and it shocks your nuts
• 1. Only accepts calls from Mel Gibson

The entire list misses the whole antenna debacle completely, but it’s still interesting to see that Apple-bashing is now part of late night comedy routines. Read more »

I just picked up the newest iPhone 4 commitment free for a friend of mine who lives outside the USA. If you don’t mind paying the higher price, anyone can buy an iPhone without a contract. Here’s what you’ll need to do:

• Locate and visit an Apple Store
• Find a sales associate
• Tell them you want to buy an iPhone 4 without a contract commitment
• Pay the full iPhone 4 price
• That’s it! Now you have a contract free iPhone

You may get a question or two about why you want a phone without the commitment, and they will likely remind you that the iPhone is a lot cheaper when it is subsidized by AT&T’s contract, but I think this is just to serve AT&T. It’s a painless process and only took me a few minutes. As far as I know you can not get an iPhone without a contract at any store except for directly at the Apple Store themselves. Interestingly enough, you also can’t buy an iPhone without contract on Apple’s website, you have to make the purchase in a physical store.

It’s important to know that in the USA regardless of buying an iPhone without the commitment, you are still tied to AT&T as the carrier. If you want to get around this, you will need to use a carrier unlock for the iPhone 4. Carrier unlocked iPhones are available in other countries, including France, the UK, and Canada, but not in the USA.

This applies to both the iPhone 3GS and iPhone 4. The price of iPhone 4 without contract starts at $599 and goes up from there, so get your wallet ready.

If you want to manually copy or backup iPhone data, you will need to know the locations of the database files on your iPhone. We’ll cover where to find SMS messages, Notes, pictures, videos, call history, voicemail, address book, and the calendar, they are all located within your iPhone /private/var/mobile/Library directory.

Remember, you will not be able access these locations directly unless your iPhone is jailbroken! Without a jailbreak you have to backup your iPhone normally since you can not access these files.

iPhone data backup locations

These are all located on the iPhone. In most cases you are looking for a database backup file named something like “sms.db” and “call_history.db”:

iPhone SMS/Text Message backup
/private/var/Mobile/Library/SMS
(If you want to, you can access and read iPhone SMS backups directly on your computer)

Notes backup
/private/var/mobile/Library/Notes

Call History backup
/private/var/mobile/Library/CallHistory

Voicemail backup
/private/var/mobile/Library/Voicemail
Voicemails are stored as 1.amr, 2.amr, within this directory. The custom greeting is stored as Greeting.amr

Contacts/Address Book backup
/private/var/mobile/Library/AddressBook/

Mail backup
/private/var/mobile/Library/Mail

Pictures and Video Recordings
/private/var/mobile/Media/DCIM/

Calendar backup
/private/var/mobile/Library/Calendar/

This is really only relevant to those who have an iPhone with jailbreak, since you can’t access these directories on the iPhone without an SSH/SFTP client. Without a jailbreak, you probably just need the local Mac/PC iPhone backup location so check that out instead.

You can manually download software updates that are available for Mac and OS X, without having to go to the Mac App Store Updates section, or without running Software Update. This is helpful for many reasons, but it’s particularly nice if you’re troubleshooting or need to bring updates to a computer that is not connected to the internet.

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It was bound to happen sooner than later, and now iPhone 4 has been unlocked. iPhone Dev Team member planetbeing announced the following today on Twitter:

Looks like I now have an unlocked iPhone 4. :)

The tweet was followed up with a few pictures displaying the iPhone 4 with a carrier unlock activated (shown).

There is currently no word on when this iPhone 4 unlock will be available to everyone, but the iPhone Dev Team usually moves pretty quick so it’s safe to assume it will be relatively soon once the kinks are worked out.

The iPhone 4 that is available in the USA is tied to the AT&T network. This makes the unlock news particularly exciting for US customers who want to use the newest phone on another carrier, but they’ll still have to pay the full iPhone 4 price without contract (starting at $599) before being able to use the phone on a network outside AT&T.

Call me old school or retro, but SNES was truly one of the greatest consoles ever made. OK, so really it wasn’t just the console, it was the games that made SNES so great, and now you can play all those awesome SNES games directly on your iPad… with a little help at least. This uses an emulator to play the old school games in iOS, but whether or not it will work on the iPad of your own will depend on a few things.

Let’s cover two different methods that can get SNES emulation going on an iPad:

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You can resize, rotate, or flip any image file via the Mac’s Terminal using the powerful command line sips tool. Manipulating images with sips is practically instantaneous, and if you need to quickly resize, rotate, or flip an image file and want to stay within the command line, it can definitely beat firing up a GUI application like Preview to perform the same image modification tasks. Note that sips changes the image file instantly, there is no confirmation required.

Let’s get started and learn how to quickly make some image edits and modifications with sips.

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If you’re in a hurry to charge your iPhone, plug it into the wall outlet. Apparently you can charge your iPhone 23% faster by using the AC power adapter when compared to charging the device through a USB port, according to testing and many firsthand reports.

Anecdotally, I have experienced that charging an iPhone from a wall outlet is much faster as well, so try it out and you’ll quickly see yourself that the difference is pretty impressive in charging time. To get a good idea of the time, enable the battery percentage indicator on the iPhone and then watch it as it charges when plugged into the wall outlet. Magic, presto, AC adapters charge the iPhone faster!

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Do you want to design a case for the iPhone? No problem thanks to Apple! A new page on Apple’s developer website contains full dimensional drawings with all the measurements necessary to quickly and easily design a case for the iPad, iPhone, or iPod.

There are over 25 dimensional drawings of the iPhone/iPad/iPod product line to help you get started. Even if you’re not a designer looking to create the next coolest iPad case they are still fun to look at the detailed pictures.

Apple Developer: Designing Cases for iPod, iPhone, iPad

Apple never ceases to amaze me, their entire product line emphasizes creativity and then they take it a step further by doing things like release these drawings, making it even easier to create for their product line-up.

If you want to see the difference between two folders on a Mac, or compare two directories contents, you can easily do so with the help of the powerful diff command.

This tutorial will show you how to compare two directories, and the contents of those directories, by using the Terminal. This command line approach will output a file containing the precise differences shown between two target folders.

To achieve this comparison, we’ll use the command line tool ‘diff’, diff is available on all Macs, along with linux and other unix operating systems, so this is effectively a cross-platform solution for comparing directories. Diff is quite simple to use for easily comparing the contents of any two directories, just follow along by using syntax detailed below.

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Taking screenshots from the command line is made easy, thanks to a utility included in Mac OS X called screencapture. Here’s how to use it:

screencapture test.jpg

The screen capture will then appear in the directory that the command was executed.

There are more advanced features to the screencapture utility though, here’s a few examples.

Open the screencapture in Preview immediately after being taken:
screencapture -P test.jpg

Take screenshots silently, with no sound playing:
screencapture -x silentscreenshot.jpg

Delay when the screenshot is taken by using the -T flag followed by seconds:
screencapture -T 3 delayedpic.jpg

Specify a file type for the screenshot (most major image formats are supported: JPG, PNG, PDF, etc):
screencapture -t pdf pdfshot.pdf

Like most other terminal commands, you can combine the flags together and do all of the above at once:
screencapture -xt pdf -T 4 pic.jpg

To see a full list of screencapture options, use the -h flag:
screencapture -h

These instructions appeared on our screen capture in Mac OS article.