How to Install Dual Boot Mac OS X 1. Lion and 1. 0. 6 Snow Leopard. Mac OS X 1. 0. 7 Developer Preview can be installed and ran alongside Mac OS X 1. Im going to show you exactly how to do this in a step by step guide alternatively, you can run it in VMware too. Why do this Having two separate installations of Mac OS X has several advantages over installing Lion atop your existing 1. I recommend dual booting instead Installing future 1. Lion releases will be easier. You are free to uninstall Lion at any time without dual booting this requires a system restore from a 1. Technology keeps you connected everywhere you go, helps you capture every moment makes your life a bit easier stay uptodate with tips tricks from eHow. This article relies too much on references to primary sources. Please improve this by adding secondary or tertiary sources. March 2011 Learn how and when to remove. A communitybuilt site of hints and tips on using Apples new Mac OS X operating system. You dont have to use Lion as your primary operating system remember its a developer preview and not intended for every day use. Now Im going to assume you already have Mac OS X 1. Lion downloaded grab Developer Preview from Apple and ready to go, and that youre currently running Mac OS X 1. Important Make sure you have a backup of your existing Mac OS X installation and disk before continuing with this guide. Time Machine makes this very easy. Any time you edit a drives partition table or install a new operating system there is always a small chance something could go wrong, so just be safe and have a backup ready. Lets get started Create a partition for Mac OS X Lion. You can create a new partition on your hard drive with Disk Utility, this does not require you to reformat the drive and you should not lose any data besides, you have that backup just in case something goes wrong, right. If youve been using your computer to manage the apps for your iOS device, that time has come to an end. The latest update to Apples iTunes removes its access to. By Eric Simenel. This tech note addresses the problems that you may face when attempting to downgrade from AIR version 20 to an older AIR version. On Monday, we learned that Microsoft was killing off the iconic Microsoft Paint program after 32 years and replacing it with Paint 3D in its upcoming Windows 10 update. WeDo-przygotowanie-scratch2offline-en-02.png' alt='Can T Install Adobe Air Mac Update' title='Can T Install Adobe Air Mac Update' />Launch Disk Utility. Select your hard drive from the left hand side. Apple claims 7 hours of battery life for the current MacBook Air 2011 2012 model. Upset buyers say the battery lasts 2 hours. Whats the truthClick on the Partition tab at the top. Click on the icon to add a new partition, name it Lion, or chimichanga, or whatever you want. Set the partition size for Lion, I chose 2. GB to make it easy. Click on Apply to create the new partition, and youll see a message like this one Click on Partition to create the partitions as indicated. Youll now see two partitions on your boot drive in Disk Utility, one that has your existing operating system Mac OS X 1. Lion partition, which is where you will install Mac OS X 1. It will look something like this Now that you have the partitions squared away, were on to step 2. Install Mac OS X 1. Lion on the new partition. Now its time to install 1. The key here is to install Lion on the newly created partition and not the default which is atop 1. This is what will enable you to dual boot between 1. Launch the Mac OS X 1. Installer and when it asks what drive to install on, choose the options to specify your own. At the Install Mac OS X screen, click to select the partition that you created in Step 1, I named it Lion as you can see in this screenshot Optional step Want to install Lion Server Click on Customize and select the checkboxes for Lion Server. Click on Install and let the installer do its business. Once the installer is running, youll see a screen like this Just let this be as it runs. Youll see a preparation window and then your Mac will reboot into the full installer. Due to the fact that you are installing from your local disk to another partition, the whole process is much faster than it would be to install from a DVD. On my Mac. Book Air 1. Lion installation took about 1. When Lion is finished installing, your Mac will now automatically boot into 1. Set your default boot drive Mac OS X 1. Lion or 1. 0. 6 Snow Leopard. Now that Lion is installed, your default boot drive is set to 1. Adobe Flash, though once essential for websites with interactive elements or video, is no longer necessary in most cases, as Web and app developers have moved on to. Can T Install Adobe Air Mac Update' title='Can T Install Adobe Air Mac Update' />You can adjust this to be 1. Launch System Preferences. Click on Startup DisksSelect your default boot drive and operating system. Thats really all there is to it. Dual Booting Select which Mac OS X volume to load on boot. If you want to boot into a different Mac OS X installation than the one that is set as your default in the previous step, you can hold down the Option key during reboot. You will then see a boot loader like the image at the very top of this tutorial, where you can select which Mac OS X version and volume to boot from. This is dual booting at its finest, and this is the best way to run the Lion Developer Preview. Remember, this is a developer preview for a reason, its not meant to be a stable operating system for daily use. Many have installed 1. Lion on top of their existing 1. Snow Leopard installation, and while this may be the easiest method it cant be directly undone and instead requires a complete system restoration to uninstall and revert back to Snow Leopard. Thats a huge pain, just give Lion its own partition and make it easy on yourself. Mac. Book Air Battery Life 2 hours or 7 hours Apple claims 7 hours of battery life for the current Mac. Book Air 2. 01. 1 2. Upset buyers say the battery lasts 2 hours. Whats the truthHow much battery life will you get Theres a big range in battery life reported for the new Mac. Book Air MBA in the article youll discover why. Youll also learn how to get great battery life. Some people are complaining of the new Mac. Book Air being too hot and running the fan too often. Others say its fine a little warm sometimes, nothing unusual. Youll learn the probable cause for this. This article gives both real life times and benchmarks for the 2. Mac. Book Airs battery life. Both the Mac. Book Air 1. Mac. Book Air 1. 3 inch models are covered. The battery life for Core i. Core i. 5 processor. The battery times in this article are specifically for the current Mac. Book Air 2. 01. 1 2. July. To piece together the Mac. Book Air battery life puzzle, information is used from industry authorities Macworld, Anand. Tech, Engadget, Ars. Technica, LAPTOP Magazineforums Whirlpool Forums, Apples Support ForumMac battery software developers coconut. Battery, App Tamer, Click. To. Plugin, Flash. FrozenMac blogs OS X Daily, i. SourceApple Support. This is a big article to write theres a lot of information to integrate, and lots of references, tricks surprising findings I dont want to leave out. Some people may be holding out on buying a new Mac. Book Air until the issue of battery life has been cleared up. For these people, Ive written a short answer with the essentials until Im able to complete the main article. If you hang on until the end of the article or just scroll down, you can also find out where you might get a discount on a new Mac. Book Air, from a company you already know. It just doesnt occur to most people that they could buy their Mac Air there, and save a bit of money. Mac. Book Air Battery Life The Short Answer. The battery life estimates that Apple gives 7 hours for Mac. Book Air 1. 3 and 5 hours for Mac. Book Air 1. 1 for wireless web are possible. The short battery times seen in forums two to three hours are possible too. Long battery life comes mainly from the processor being idle most of the time, saving lots of power. Making the processor just a little busier can burn down the battery surprisingly faster. Just 5 utilization of one of the Airs two CPU cores can translate into 2. Flash, the technology used for a lot of web video and animated ads, seems to be the usual suspect for most people in using CPU and using up their battery. One bad Flash advertising banner can use a whole CPU core. Apple ships the new Mac. Book Air without Flash installed. If you use the Air that way, you will most likely reach Apples wireless web battery life estimates. You could uninstall or switch off Flash to maximize your MBA battery life. Most people, however, want Flash to watch video on the Internet. There is software such as Click. To. Plugin free for Safari, that disables Flash items on web pages until you click on the Flash item to enable it. Leaving applications open swallows battery. I doubled my battery life by closing apps I wasnt using. You can see how much power your apps are using with the excellent free app coconut. Battery. Id close an app and watch the number of watts being used drop. Recommended. Some software installs startup items, daemons, extensions or background processes that consume CPU. Possible background battery abusers are Adobe CS5, Microsoft Office 2. Skype. For example Outlook on my Air is checking my office emails in the background. If you install a lot of software, you probably have a lot of software running in the background that may not be visible as an app. Quit or turn off what you can. If you use Apple Migration Assistant to move your previous Macs software to your Mac. Book Air, you may have dragged years of unused background software across. If youre guzzling battery, try a clean install of Mac OS X Lion and the apps you actually use. Screen brightness affects power use, but the number of apps running has a much bigger effect. Mac. Book Air i. 5 vs i. Battery time for the i. Mac. Book Air. The i. Mac. Book Air get roughly half an hour more battery time that the i. Mac. Book Air 1. 1. You dont need to see high CPU usage in the Activity Monitor app for your battery to be guzzled. Background software starting, failing and restarting repeatedly will eat battery. If your Mac. Book Air has short battery life inexplicably, running select features of the Onyx utility has fixed battery life problems for some people. Another possibility if your battery doesnt last long is to try a SMC reset of your Mac. Book Air. I havent confirmed this helps its typically done when the Mac. Book Air fan is running constantly. Please leave a comment if it helps your battery life. Yes this really is the short answer Now you know why Im tackling writing this article in parts Okay, here they are Mac. Book Air battery life estimates for different patterns of usage. For all of these, the 1. Air does about half an hour more, the 1. Air around half an hour less. Wireless Web no Flash roughly 7 hours. Wireless Web Flash roughly 5 hours. Wireless Web Flash, Downloading Video roughly 3. Lots of apps or background software running as well roughly 2. Source mostly Anand. TechIf you already got what youve needed from this article and youve read enough, please consider clicking 1, Tweet, Like or even better linking to this article from your website or blog. Theres a lot of misinformation about Mac. Book Air battery life Im aiming to clean that up and consolidate it here. Still, its not much use unless people can find this article in Google. Making a link to this article with the text Mac. Book Air Battery Life helps this article make the first page for search results. Thanks if you can Oh, and dont forget the Mac. Book Air discounts, if thats of interest. Mac. Book Air Battery Capacity. Lets start with facts. The Mac. Book Air MBA comes in two sizes an 1. If you want some facts to help decide between the models, see Mac. How To Install New Radio Wires here. Book Air 1. 1 or 1. Fact 1 The Mac. Book Air 1. This is because the 1. Air has a smaller battery. The battery for both size Macs is a lithium polymer battery. The 1. 1 inch MBA comes with a 3. The 1. 3 inch MBA, being larger, can fit a bigger battery. The Mac. Book Air 1. Heres a table of the battery capacity for the current Mac. Book Air models. Ive included the Mac. Book Pro battery capacities for comparison The 1. Air has 4. 3 more battery capacity that the 1. Air. Offsetting  the 1. Air will use more battery for the screen backlight because of its larger screen. The 1. 3 inch Mac Airs screen is about 2. Mac Air, so the 1. Air at the same brightness would pull roughly a quarter more juice for the screen. Complicating the screen size power use comparison is the fact that Mac. Book Airs use screens from two different manufacturers Samsung LG. The LCD panels power requirements may be different. It is clear that the 1. MBA has more battery life than the 1. MBA, even with the power consumption of its bigger screen. Specifics on this battery length advantage of the 1. Mac. Book Air Battery Life According to Apple. Now lets get the official story. Apple gives the following estimates on its website for the new Mac. Book Airs battery life Model. Battery Life for Wireless Web. Mac. Book Air 1. 1 inch.