Music And Gemstones' Mac OS
Start up from macOS Recovery
Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:
Apple silicon
Turn on your Mac and continue to press and hold the power button until you see the startup options window. Click the gear icon labeled Options, then click Continue.
Intel processor
Make sure that your Mac has a connection to the internet. Then turn on your Mac and immediately press and hold Command (⌘)-R until you see an Apple logo or other image.
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GarageBand is a fully equipped music creation studio right inside your Mac — with a complete sound library that includes instruments, presets for guitar and voice, and an incredible selection of session drummers and percussionists. With Touch Bar features for MacBook Pro and an intuitive, modern design, it’s easy to learn, play, record. Our Gemstone Encyclopedia has information on over 300 gemstones, from traditional and popular jewelry standards to collector’s stones that rarely appear for sale. Each entry has photos and detailed information about the gem’s properties. Entries for jewelry stones also have price guidelines and discussions of their most important value factors. PDSnet is the largest local provider of stock market data, providing data of equities quoted on the JSE, Futures, Unit Trusts, Currencies and Commodities.
If you're asked to select a user you know the password for, select the user, click Next, then enter their administrator password.
Reinstall macOS
Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.
Follow these guidelines during installation:
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
- Allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
After installation is complete, your Mac might restart to a setup assistant. If you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
Other macOS installation options
When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions:
- On an Intel-based Mac: If you use Shift-Option-Command-R during startup, you're offered the macOS that came with your Mac, or the closest version still available. If you use Option-Command-R during startup, in most cases you're offered the latest macOS that is compatible with your Mac. Otherwise you're offered the macOS that came with your Mac, or the closest version still available.
- If the Mac logic board was just replaced, you may be offered only the latest macOS that is compatible with your Mac. If you just erased your entire startup disk, you may be offered only the macOS that came with your Mac, or the closest version still available.
You can also use these methods to install macOS, if the macOS is compatible with your Mac:
- Use the App Store to download and install the latest macOS.
- Use the App Store or a web browser to download and install an earlier macOS.
- Use a USB flash drive or other secondary volume to create a bootable installer.
What’s the first thing that comes to mindwhen you think of precious gemstones? Diamonds, Emeralds, Sapphire and Rubies? —these are clearly some of the world’s most valuable gems. But do you know thatthere’s still more? You might not know this, but we have up to 200 varieties ofnatural gemstones in the world today. And surprisingly, most of these gemstonesare rarer and of course, even more, precious than the ones you’ve seen allthese years.
Still in doubt? Well here are our top ten gemstones that we think every collector should own.
1. Black Opal
Ever heard of Opals? If yes, there’s a goodchance of knowing that they’re typically creamy white in color. But did you knowthat there are also Black Opals? These gemstones happen to be much rarer thanthe latter and most of them come from the Lightning Ridge area of New SouthWales, Australia. In the world of Black Opals, the most valuable ones are knownto have a darker background color and bright play of color. In 1983, the precious “Aurora Australis” was discovered in LightningRidge; this 180-carat gemstone was considered the most valuable Opal ever.What’s more, in 2005, the Black Opal was valued at a whopping AUD$1,000,000!
2. Tanzanite
Next up is the Tanzanite — a gemstone thatcan only be found in the foothills of Mount Kilimanjaro in Tanzania. It’s goodto point out that this beautiful blue gemstone was left in the dark until iteventually went mainstream in the 1960’s. And of course, its initial popularitywas as a result of the efforts of Tiffany & Co. It wasdiscovered in 1967 and christened by the jewelry company in 1968. For the mostpart, a good number of these gems are heat treated to improve the bluecoloration. But of course, Tanzanite that hasn’t been heated still comes withan authentic blue color and they also tend to be of much higher value. To sumit up, there’s a good chance that the value of this gemstone will increase withtime. Why? Well, it’s because Tanzanite can only be found in a particularlocation— a small area near the foot of Mt. Kilimanjaro; it’s a no-brainer.
3. Larimar
Also known as Stefilia’s stone, Larimer isan incredibly rare blue variety of the mineral Pectolite. This gemstone is foundonly in the Dominican Republic and its colors varies from white, green-blue, lightblue to deep blue. It’s important to note that the name of this stone wascreated by Miguel Méndez; the man who shot it into limelight. Larimar isactually the combination of the first four letters of his daughter’s name andthe Spanish word for sea — Larissa and mar. This stonehas been in existence for generations and the locals were very much aware ofits presence (sediments were usually washed up the seashore). However, it wasn’t until the 1970’s that significant amounts of the mineral were discovered in theground to start mining and extraction.
4. Grandiderite
This gemstone was initially discovered insouthern Madagascar but has since been found in other places around the world.For the most part, Grandiderite was found in 1902 by French mineralogist AlfredLacroix but was named after the French explorer Alfred Grandidier. A goodnumber of these stones are known to be translucent the rarest or most valuableones are transparent. It’s good to point out that the gemstone was initiallymistaken for yet another rare stone, Serendibite, but was eventually identifiedas Grandiderite after expert analysis. Afterwards, the precious stone was soldfor an undisclosed amount of money. It’s truly one of the world’s rarest gemsthat deserves to be on the top ten list.
5. Musgravite
So far so good, we’ve explored some of theworld’s rarest gemstones, but you won’t be wrong to see Musgravite as“exceptionally rare.”
This gemstone was discovered in 1967 inSouth Australia’s Musgrave thus its name.During this timethere were just eight popular Musgravite stones in the world. However, as timewent on, small quantities of the gem has been found in Madagascar as well asother places like Antarctica, Greenland, Tanzania and Sri Lanka. All in all, Musgravite is still incredibly scarce and of course, comes with a high pricetag — up to $35,000 per carat.
Music And Gemstones' Mac Os 11
6. Alexandrite
This incredibly color-shifting gem wasfound in 1830 in the Ural Mountains of Russia and was named in honor of theRussian Tsar Alexander II. Perhaps the biggest highlight of Alexandrite is itsremarkable color-changing capability; it looks blue-green in sunlight but turnsred-purple under incandescent light. In fact, the gem’s nickname “Emerald byday, Ruby by night” came as a result of how it shines in different lightsources. To sum it up, new deposits of this stone have since been discovered inSri Lanka, East Africa and Brazil. But of course, these new mines didn’t evenmake a dent on its rarity and value.
Music And Gemstones' Mac Os X
7. Painite
Initially discovered in 1951 by Britishgemologist Arthur Charles Davy Pain, Painite is indisputably one of the world’srarest gemstones. It’s important to note that the gemstone was recognized as anew mineral in 1957 and just one specimen of the dark red crystal was known tohumankind. However, as years passed by, newer specimens were found and rightnow, over 1000 stones has been produced by mines in Myanmar (but still remainsscarce). All in all, this gemstone still holds its place as one of the world’smost valuable as just a carat can be priced at $60,000!
8. Benitoite
While small deposits in places like Japan,Australia and Arkansas has been discovered of this rare gemstone, the onlycommercially known Benitoite mine is located in San Benito, California. It’showever important to note that the deposit no longer produces this beautiful gem, thus increasing its scarcity. As for the history of this gem, it was initially discovered in 1907 by geologist George Louderbackand was named the official state gemstone of California in 1985.
9. Taaffeite
Next on the list is this gemstone, Taaffeite. It was found by mere coincidence. In essence, it was identified by Austriangeologist Count Edward Charles Richard Taaffe while sifting through a box ofsimilarly colored Sri Lankan Spinel gemstones. Ever since its discovery in1945, just a handful of the stones have been found and it’s mostly in Sri Lankaand Tanzania.
10. Red Beryl
Last but not least is Red Beryl — agem-quality crystal which can be found only in the Wah Wah Mountains of Utah.Although this gem has popped up in other locations in Utah, Mexico and NewMexico, the ones in the Wah Wah Mountains remain the most authentic. In fact Red Beryl is so rare up to the point where the Utah Geological Survey estimatedthat there’s just one gem-quality Red Beryl for every 150,000 gem-quality Diamonds. What’s more, the market price of Red Beryl stones can be as high as$10,000 per carat.
So there you have it. These are our top ten gemstones that we think all collectors should consider. Remember the list is arranged in no particularorder — in essence, they’re all awesome and highly collectible!